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Finding the Fourth Proportional to 90,508.92, 124,981.66 and 56,575.40

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Solution

The fourth proportional to 90,508.92, 124,981.66 and 56,575.40 is: 78,123.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,508.92 : 124,981.66 = 56,575.40 : x
  2. Step 2: Convert to fraction form
    90,508.92/124,981.66 = 56,575.40/x
  3. Step 3: Cross multiply
    90,508.92x = 124,981.66 × 56,575.40
  4. Step 4: Simplify right side
    90,508.92x = 7,070,887,407.16
  5. Step 5: Solve for x
    x = 7,070,887,407.16/90,508.92
  6. Step 6: Final answer
    x = 78,123.65

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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.