Home / 129,331.28-178,476.36-72,743.24

Finding the Fourth Proportional to 129,331.28, 178,476.36 and 72,743.24

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Solution

The fourth proportional to 129,331.28, 178,476.36 and 72,743.24 is: 100,385.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,331.28 : 178,476.36 = 72,743.24 : x
  2. Step 2: Convert to fraction form
    129,331.28/178,476.36 = 72,743.24/x
  3. Step 3: Cross multiply
    129,331.28x = 178,476.36 × 72,743.24
  4. Step 4: Simplify right side
    129,331.28x = 12,982,948,689.81
  5. Step 5: Solve for x
    x = 12,982,948,689.81/129,331.28
  6. Step 6: Final answer
    x = 100,385.22

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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.