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Finding the Fourth Proportional to 80,863.10, 121,294.65 and 80,344.70

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Solution

The fourth proportional to 80,863.10, 121,294.65 and 80,344.70 is: 120,517.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,863.10 : 121,294.65 = 80,344.70 : x
  2. Step 2: Convert to fraction form
    80,863.10/121,294.65 = 80,344.70/x
  3. Step 3: Cross multiply
    80,863.10x = 121,294.65 × 80,344.70
  4. Step 4: Simplify right side
    80,863.10x = 9,745,382,265.86
  5. Step 5: Solve for x
    x = 9,745,382,265.86/80,863.10
  6. Step 6: Final answer
    x = 120,517.05

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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.