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Finding the Fourth Proportional to 80,863.60, 121,311.60 and 67,806.40

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Solution

The fourth proportional to 80,863.60, 121,311.60 and 67,806.40 is: 101,723.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,863.60 : 121,311.60 = 67,806.40 : x
  2. Step 2: Convert to fraction form
    80,863.60/121,311.60 = 67,806.40/x
  3. Step 3: Cross multiply
    80,863.60x = 121,311.60 × 67,806.40
  4. Step 4: Simplify right side
    80,863.60x = 8,225,702,874.24
  5. Step 5: Solve for x
    x = 8,225,702,874.24/80,863.60
  6. Step 6: Final answer
    x = 101,723.18

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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.