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Finding the Fourth Proportional to 80,803.73, 121,691.82 and 71,560.01

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Solution

The fourth proportional to 80,803.73, 121,691.82 and 71,560.01 is: 107,770.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,803.73 : 121,691.82 = 71,560.01 : x
  2. Step 2: Convert to fraction form
    80,803.73/121,691.82 = 71,560.01/x
  3. Step 3: Cross multiply
    80,803.73x = 121,691.82 × 71,560.01
  4. Step 4: Simplify right side
    80,803.73x = 8,708,267,498.32
  5. Step 5: Solve for x
    x = 8,708,267,498.32/80,803.73
  6. Step 6: Final answer
    x = 107,770.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.