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Finding the Fourth Proportional to 83,909.20, 125,863.80 and 76,910.80

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Solution

The fourth proportional to 83,909.20, 125,863.80 and 76,910.80 is: 115,366.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,909.20 : 125,863.80 = 76,910.80 : x
  2. Step 2: Convert to fraction form
    83,909.20/125,863.80 = 76,910.80/x
  3. Step 3: Cross multiply
    83,909.20x = 125,863.80 × 76,910.80
  4. Step 4: Simplify right side
    83,909.20x = 9,680,285,549.04
  5. Step 5: Solve for x
    x = 9,680,285,549.04/83,909.20
  6. Step 6: Final answer
    x = 115,366.20

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Similar ratio
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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.