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Finding the Fourth Proportional to 71,937.92, 99,273.92 and 40,107.20

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Solution

The fourth proportional to 71,937.92, 99,273.92 and 40,107.20 is: 55,347.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,937.92 : 99,273.92 = 40,107.20 : x
  2. Step 2: Convert to fraction form
    71,937.92/99,273.92 = 40,107.20/x
  3. Step 3: Cross multiply
    71,937.92x = 99,273.92 × 40,107.20
  4. Step 4: Simplify right side
    71,937.92x = 3,981,598,964.22
  5. Step 5: Solve for x
    x = 3,981,598,964.22/71,937.92
  6. Step 6: Final answer
    x = 55,347.71

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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.