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Finding the Fourth Proportional to 71,934.40, 99,264.40 and 40,105.04

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Solution

The fourth proportional to 71,934.40, 99,264.40 and 40,105.04 is: 55,342.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,934.40 : 99,264.40 = 40,105.04 : x
  2. Step 2: Convert to fraction form
    71,934.40/99,264.40 = 40,105.04/x
  3. Step 3: Cross multiply
    71,934.40x = 99,264.40 × 40,105.04
  4. Step 4: Simplify right side
    71,934.40x = 3,981,002,732.58
  5. Step 5: Solve for x
    x = 3,981,002,732.58/71,934.40
  6. Step 6: Final answer
    x = 55,342.13

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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.