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Finding the Fourth Proportional to 81,099.96, 121,712.60 and 41,691.48

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Solution

The fourth proportional to 81,099.96, 121,712.60 and 41,691.48 is: 62,569.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,099.96 : 121,712.60 = 41,691.48 : x
  2. Step 2: Convert to fraction form
    81,099.96/121,712.60 = 41,691.48/x
  3. Step 3: Cross multiply
    81,099.96x = 121,712.60 × 41,691.48
  4. Step 4: Simplify right side
    81,099.96x = 5,074,378,428.65
  5. Step 5: Solve for x
    x = 5,074,378,428.65/81,099.96
  6. Step 6: Final answer
    x = 62,569.43

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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.