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Finding the Fourth Proportional to 87,799.92, 120,920.76 and 75,859.44

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Solution

The fourth proportional to 87,799.92, 120,920.76 and 75,859.44 is: 104,475.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,799.92 : 120,920.76 = 75,859.44 : x
  2. Step 2: Convert to fraction form
    87,799.92/120,920.76 = 75,859.44/x
  3. Step 3: Cross multiply
    87,799.92x = 120,920.76 × 75,859.44
  4. Step 4: Simplify right side
    87,799.92x = 9,172,981,137.97
  5. Step 5: Solve for x
    x = 9,172,981,137.97/87,799.92
  6. Step 6: Final answer
    x = 104,475.96

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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.