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Finding the Fourth Proportional to 80,873.40, 121,419.45 and 51,348.90

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Solution

The fourth proportional to 80,873.40, 121,419.45 and 51,348.90 is: 77,092.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,873.40 : 121,419.45 = 51,348.90 : x
  2. Step 2: Convert to fraction form
    80,873.40/121,419.45 = 51,348.90/x
  3. Step 3: Cross multiply
    80,873.40x = 121,419.45 × 51,348.90
  4. Step 4: Simplify right side
    80,873.40x = 6,234,755,196.11
  5. Step 5: Solve for x
    x = 6,234,755,196.11/80,873.40
  6. Step 6: Final answer
    x = 77,092.78

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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.