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Finding the Fourth Proportional to 121,691.87, 182,466.68 and 81,757.25

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Solution

The fourth proportional to 121,691.87, 182,466.68 and 81,757.25 is: 122,588.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,691.87 : 182,466.68 = 81,757.25 : x
  2. Step 2: Convert to fraction form
    121,691.87/182,466.68 = 81,757.25/x
  3. Step 3: Cross multiply
    121,691.87x = 182,466.68 × 81,757.25
  4. Step 4: Simplify right side
    121,691.87x = 14,917,973,336.56
  5. Step 5: Solve for x
    x = 14,917,973,336.56/121,691.87
  6. Step 6: Final answer
    x = 122,588.09

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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.