SOLUTION: The average of four numbers is 98. If three of the numbers are 86, 87, and 91, what is the fourth number?

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Question 97432: The average of four numbers is 98. If three of the numbers are 86, 87, and 91, what is the fourth number?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
(86+87+91+x)/4=98
(264+x)/4=98
264+x=392
x=392-264
x=128 is the missing number.
(86+87+91+128)/4=98
392=392