Zuckerberg is now the fourth richest billionaire in the world.

Facebook's (FB) excellent performance on the markets have placed its CEO, Mark Zuckerberg, fourth in the Bloomberg Billionaires Index and pushing Amazon's (AMZN) CEO Jeff Bezos aside to fifth place.The Facebook founder’s wealth is estimated to be worth $50 billion on Tuesday, according to Bloomberg. This increase comes at a time when Facebook has had higher sales and profits near the end of January this year.Last week, Facebook's stock price pushed him past the each of the Koch brothers, and his wealth has been climbing ever since.

Meanwhile Microsoft (MSFT) CEO Bill Gates remains on top, with a net worth totalling $78.7 billion. Spanish designer Amancio Ortega of the Zara fashion came in second with $69.3 billion, and Wall Street tycoon Warren Buffett came in third, with $59.6 billion. Recent stock market trends have have hit some of the world's richest billionaires hard, with many losing billions in wealth.

Zuckerberg now ranks close to Mexican billionaire, Carlos Slim, who was the richest person in the world from 2010 to 2013, who now is worth $75.6 billion according to Forbes.The positive momentum in Zuckerberg's wealth is a result of Facwebook's strong showings at the market. Just last week the company released a quarterly report that exceeded expectations and the company has since seen a rise of 21% in stocks since the relaese of the report in late January.

Mark Zuckerberg