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Finding the Fourth Proportional to 71,719.73, 107,481.18 and 45,377.31

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Solution

The fourth proportional to 71,719.73, 107,481.18 and 45,377.31 is: 68,003.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,719.73 : 107,481.18 = 45,377.31 : x
  2. Step 2: Convert to fraction form
    71,719.73/107,481.18 = 45,377.31/x
  3. Step 3: Cross multiply
    71,719.73x = 107,481.18 × 45,377.31
  4. Step 4: Simplify right side
    71,719.73x = 4,877,207,142.00
  5. Step 5: Solve for x
    x = 4,877,207,142.00/71,719.73
  6. Step 6: Final answer
    x = 68,003.70

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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.