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Finding the Fourth Proportional to 125,792.71, 188,689.07 and 86,229.88

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Solution

The fourth proportional to 125,792.71, 188,689.07 and 86,229.88 is: 129,344.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,792.71 : 188,689.07 = 86,229.88 : x
  2. Step 2: Convert to fraction form
    125,792.71/188,689.07 = 86,229.88/x
  3. Step 3: Cross multiply
    125,792.71x = 188,689.07 × 86,229.88
  4. Step 4: Simplify right side
    125,792.71x = 16,270,635,607.26
  5. Step 5: Solve for x
    x = 16,270,635,607.26/125,792.71
  6. Step 6: Final answer
    x = 129,344.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.