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Finding the Fourth Proportional to 67,197.38, 100,766.88 and 20,439.32

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Solution

The fourth proportional to 67,197.38, 100,766.88 and 20,439.32 is: 30,650.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,197.38 : 100,766.88 = 20,439.32 : x
  2. Step 2: Convert to fraction form
    67,197.38/100,766.88 = 20,439.32/x
  3. Step 3: Cross multiply
    67,197.38x = 100,766.88 × 20,439.32
  4. Step 4: Simplify right side
    67,197.38x = 2,059,606,505.72
  5. Step 5: Solve for x
    x = 2,059,606,505.72/67,197.38
  6. Step 6: Final answer
    x = 30,650.10

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1.5x scale

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.