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Finding the Fourth Proportional to 39,882.80, 59,872.80 and 20,151.20

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Solution

The fourth proportional to 39,882.80, 59,872.80 and 20,151.20 is: 30,251.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,882.80 : 59,872.80 = 20,151.20 : x
  2. Step 2: Convert to fraction form
    39,882.80/59,872.80 = 20,151.20/x
  3. Step 3: Cross multiply
    39,882.80x = 59,872.80 × 20,151.20
  4. Step 4: Simplify right side
    39,882.80x = 1,206,508,767.36
  5. Step 5: Solve for x
    x = 1,206,508,767.36/39,882.80
  6. Step 6: Final answer
    x = 30,251.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.