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Finding the Fourth Proportional to 67,399.64, 101,115.02 and 20,013.68

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Solution

The fourth proportional to 67,399.64, 101,115.02 and 20,013.68 is: 30,025.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,399.64 : 101,115.02 = 20,013.68 : x
  2. Step 2: Convert to fraction form
    67,399.64/101,115.02 = 20,013.68/x
  3. Step 3: Cross multiply
    67,399.64x = 101,115.02 × 20,013.68
  4. Step 4: Simplify right side
    67,399.64x = 2,023,683,956.30
  5. Step 5: Solve for x
    x = 2,023,683,956.30/67,399.64
  6. Step 6: Final answer
    x = 30,025.15

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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.