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Finding the Fourth Proportional to 73,073.61, 109,614.36 and 20,487.20

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Solution

The fourth proportional to 73,073.61, 109,614.36 and 20,487.20 is: 30,731.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,073.61 : 109,614.36 = 20,487.20 : x
  2. Step 2: Convert to fraction form
    73,073.61/109,614.36 = 20,487.20/x
  3. Step 3: Cross multiply
    73,073.61x = 109,614.36 × 20,487.20
  4. Step 4: Simplify right side
    73,073.61x = 2,245,690,844.95
  5. Step 5: Solve for x
    x = 2,245,690,844.95/73,073.61
  6. Step 6: Final answer
    x = 30,731.90

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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.