Home / 123,117.66-169,902.95-72,139.46

Finding the Fourth Proportional to 123,117.66, 169,902.95 and 72,139.46

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Solution

The fourth proportional to 123,117.66, 169,902.95 and 72,139.46 is: 99,552.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,117.66 : 169,902.95 = 72,139.46 : x
  2. Step 2: Convert to fraction form
    123,117.66/169,902.95 = 72,139.46/x
  3. Step 3: Cross multiply
    123,117.66x = 169,902.95 × 72,139.46
  4. Step 4: Simplify right side
    123,117.66x = 12,256,705,855.20
  5. Step 5: Solve for x
    x = 12,256,705,855.20/123,117.66
  6. Step 6: Final answer
    x = 99,552.78

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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.