The bank balances of several people are as follows: $123.49, $75.23, −$123.69, $75.89, −$123.43. Which balance is the lowest? Give the answer in dollars.

The lowest bank balance is $-123.69.

To find the lowest bank balance, we need to compare the given amounts.

The bank balances are:
1. $123.49
2. $75.23
3. -$123.69
4. $75.89
5. -$123.43

The lowest balance is -$123.69.

Therefore, the answer is -$123.69 dollars.