Yahoo may boast the most popular properties on the web, but the company doesn't hold a candle to the fourth most popular site, Facebook, in terms of net value. A new report from research firm Nyppex relayed by MercuryNews.com indicates that Facebook demonstrated rapid, impressive gains in 2010.

The company compared enterprise values of select private and public companies and found that Facebook has increased its net worth by 56 percent since the middle of the year. The social network is worth an estimated $41.2 billion.

While Facebook has a long way to go if it hopes to catch up to internet giant Google (worth an estimated $149 billion) or ecommerce platform Amazon ($73.5 billion), it is one of the fastest-growing companies in terms of net worth. It far outshines startups Groupon or Twitter, each worth less than $5 billion. Plus, the social site has already exceeded established companies eBay and Yahoo in value, worth $32.8 billion and $18.4 billion, respectively.

Marketers looking to profit from the value of Facebook know they can employ social media content marketing to catch clicks and develop brand advocates. They might also want to monitor ecommerce developments on the social network to make money directly on Facebook. As Brafton reported last week, Mark Zuckerberg's social site is exploring partnerships that will help it create storefronts for brands on Facebook.