50 Mexican peso is worth 3.79492 U.S. Dollars. AnswerParty on!
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The peso (originally established as the peso convertible) is the currency of Argentina, identified by the symbol $ preceding the amount in the same way as many countries using dollar currencies. It is subdivided into 100 centavos. Its ISO 4217 code is ARS. Several earlier currencies of Argentina were also called "peso"; as inflation progressed a new currency with a few zeroes dropped and a different qualifier (peso national currency, peso law 18188, peso argentino...) was introduced. Since 1969 thirteen zeroes have been dropped (a factor of ten trillion).
The peso (sign: $; code: MXN) is the currency of Mexico. Modern peso and dollar currencies have a common origin in the 15th–19th century Spanish dollar, most continuing to use its sign, "$". The Mexican peso is the 13th most traded currency in the world, the third most traded in the Americas (after the US Dollar and Canadian Dollar), and the most traded currency in Latin America.
The current ISO 4217 code for the peso is MXN; prior to the 1993 revaluation (see below), the code MXP was used. The peso is subdivided into 100 centavos, represented by "¢". As of January 4, 2013, the peso's exchange rate was $16.5914 per euro and $12.7597 per U.S. dollar 
The United States dollar (sign: $; code: USD; also abbreviated US$), is referred to as the U.S. dollar or American dollar. It is the official currency of the United States and its overseas territories. It is divided into 100 smaller units called cents.
During World War II in the Philippines, the occupying Japanese government issued fiat currency in several denominations; this is known as the Japanese government-issued Philippine fiat peso. The Japanese-sponsored Second Philippine Republic under Jose P. Laurel outlawed possession of guerrilla currency, and declared a monopoly on the issuance of money, so that anyone found to possess guerrilla notes could be arrested.
Some Filipinos called the fiat peso "Mickey Mouse money". Many survivors of the war]who?[ tell stories of going to the market laden with suitcases or "bayong" (native bags made of woven coconut or buri leaf strips) overflowing with the Japanese-issued bills. According to one witness, 75 "Mickey Mouse" pesos, or about 35 U.S. dollars at that time, could buy one duck egg. In 1944, a box of matches cost more than 100 Mickey Mouse pesos.
The peso is the currency of Colombia. Its ISO 4217 code is COP and it is also informally abbreviated as COL$. However, the official peso symbol is $. As of 4 June 2013, the exchange rate of the Colombian peso is 1,900.45 Colombian pesos to 1 U.S. dollar.