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Finding the Fourth Proportional to 82,446.80, 123,670.20 and 20,117.30

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Solution

The fourth proportional to 82,446.80, 123,670.20 and 20,117.30 is: 30,175.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,446.80 : 123,670.20 = 20,117.30 : x
  2. Step 2: Convert to fraction form
    82,446.80/123,670.20 = 20,117.30/x
  3. Step 3: Cross multiply
    82,446.80x = 123,670.20 × 20,117.30
  4. Step 4: Simplify right side
    82,446.80x = 2,487,910,514.46
  5. Step 5: Solve for x
    x = 2,487,910,514.46/82,446.80
  6. Step 6: Final answer
    x = 30,175.95

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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.