Home / 123,220.30-169,965.71-80,781.56

Finding the Fourth Proportional to 123,220.30, 169,965.71 and 80,781.56

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Solution

The fourth proportional to 123,220.30, 169,965.71 and 80,781.56 is: 111,427.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,220.30 : 169,965.71 = 80,781.56 : x
  2. Step 2: Convert to fraction form
    123,220.30/169,965.71 = 80,781.56/x
  3. Step 3: Cross multiply
    123,220.30x = 169,965.71 × 80,781.56
  4. Step 4: Simplify right side
    123,220.30x = 13,730,095,200.31
  5. Step 5: Solve for x
    x = 13,730,095,200.31/123,220.30
  6. Step 6: Final answer
    x = 111,427.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.