Home / 129,571.38-178,801.20-72,207.18

Finding the Fourth Proportional to 129,571.38, 178,801.20 and 72,207.18

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Solution

The fourth proportional to 129,571.38, 178,801.20 and 72,207.18 is: 99,641.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,571.38 : 178,801.20 = 72,207.18 : x
  2. Step 2: Convert to fraction form
    129,571.38/178,801.20 = 72,207.18/x
  3. Step 3: Cross multiply
    129,571.38x = 178,801.20 × 72,207.18
  4. Step 4: Simplify right side
    129,571.38x = 12,910,730,432.62
  5. Step 5: Solve for x
    x = 12,910,730,432.62/129,571.38
  6. Step 6: Final answer
    x = 99,641.84

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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.