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Finding the Fourth Proportional to 90,545.28, 124,918.20 and 66,728.76

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Solution

The fourth proportional to 90,545.28, 124,918.20 and 66,728.76 is: 92,060.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,545.28 : 124,918.20 = 66,728.76 : x
  2. Step 2: Convert to fraction form
    90,545.28/124,918.20 = 66,728.76/x
  3. Step 3: Cross multiply
    90,545.28x = 124,918.20 × 66,728.76
  4. Step 4: Simplify right side
    90,545.28x = 8,335,636,587.43
  5. Step 5: Solve for x
    x = 8,335,636,587.43/90,545.28
  6. Step 6: Final answer
    x = 92,060.42

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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.