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Finding the Fourth Proportional to 83,658.89, 125,487.56 and 20,479.30

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Solution

The fourth proportional to 83,658.89, 125,487.56 and 20,479.30 is: 30,718.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,658.89 : 125,487.56 = 20,479.30 : x
  2. Step 2: Convert to fraction form
    83,658.89/125,487.56 = 20,479.30/x
  3. Step 3: Cross multiply
    83,658.89x = 125,487.56 × 20,479.30
  4. Step 4: Simplify right side
    83,658.89x = 2,569,897,124.99
  5. Step 5: Solve for x
    x = 2,569,897,124.99/83,658.89
  6. Step 6: Final answer
    x = 30,718.76

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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.