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Finding the Fourth Proportional to 80,862.60, 121,310.10 and 67,805.40

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Solution

The fourth proportional to 80,862.60, 121,310.10 and 67,805.40 is: 101,721.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,862.60 : 121,310.10 = 67,805.40 : x
  2. Step 2: Convert to fraction form
    80,862.60/121,310.10 = 67,805.40/x
  3. Step 3: Cross multiply
    80,862.60x = 121,310.10 × 67,805.40
  4. Step 4: Simplify right side
    80,862.60x = 8,225,479,854.54
  5. Step 5: Solve for x
    x = 8,225,479,854.54/80,862.60
  6. Step 6: Final answer
    x = 101,721.68

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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.