09/20/2012 02:08 pm ET

To Match Walton Heirs' Fortune, You'd Need To Work At Walmart For 7 Million Years

Just how rich are the Waltons? According to the latest edition of the Forbes 400, released yesterday, the six wealthiest heirs to the Walmart empire are together worth a staggering $115 billion. This marks the first time in American history that one family has controlled a 12-figure fortune. While the nation's richest person is still Bill Gates, the sixth, seventh, eighth, and ninth richest Americans are all Waltons.

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