Home / 82,581.60-123,872.40-20,251.56

Finding the Fourth Proportional to 82,581.60, 123,872.40 and 20,251.56

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Solution

The fourth proportional to 82,581.60, 123,872.40 and 20,251.56 is: 30,377.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,581.60 : 123,872.40 = 20,251.56 : x
  2. Step 2: Convert to fraction form
    82,581.60/123,872.40 = 20,251.56/x
  3. Step 3: Cross multiply
    82,581.60x = 123,872.40 × 20,251.56
  4. Step 4: Simplify right side
    82,581.60x = 2,508,609,340.94
  5. Step 5: Solve for x
    x = 2,508,609,340.94/82,581.60
  6. Step 6: Final answer
    x = 30,377.34

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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.