Question 681234
Let X be the salary of one of the department heads
 So 3X is the salary of the president.

Then X + 3X = $210,000
         4X = $210,000
          X = $210,000/4 = $52,500

Therefore the salary of one of the department heads is $52,500
 and the salary of the president is 3($52500) = $157,500