What happens to the remaining balance after a home is auctioned for a lower price?

[CJ Moulton]

Hello All,

Recently I have been reading up on Foreclosures, and I went online to look at some foreclosed properties (Auction.com), but there's something I don't quite understand...

I noticed that the starting bid for a lot of properties is $100. Now I am not expecting to show up to auction and get the place for $100, however what if the last bid ends up being much lower than what's owed on the house?

For example:

A property worth $200,000 has started the foreclosure process. The owner stopped making payments around $100,000. (To make things a bit easier) This means the remaining balance is $100,000, but let's say you get the property for a winning bid of $10,000. What happens to that $90,000? Would that become the remaining balance? Is the rest expected to be paid? 

I hope I have explained this in a comprehensive way! Any insight is greatly appreciated.