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Finding the Fourth Proportional to 67,124.54, 100,691.25 and 19,743.87

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Solution

The fourth proportional to 67,124.54, 100,691.25 and 19,743.87 is: 29,617.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,124.54 : 100,691.25 = 19,743.87 : x
  2. Step 2: Convert to fraction form
    67,124.54/100,691.25 = 19,743.87/x
  3. Step 3: Cross multiply
    67,124.54x = 100,691.25 × 19,743.87
  4. Step 4: Simplify right side
    67,124.54x = 1,988,034,929.78
  5. Step 5: Solve for x
    x = 1,988,034,929.78/67,124.54
  6. Step 6: Final answer
    x = 29,617.11

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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.