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Finding the Fourth Proportional to 121,691.90, 182,289.98 and 99,282.44

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Solution

The fourth proportional to 121,691.90, 182,289.98 and 99,282.44 is: 148,721.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,691.90 : 182,289.98 = 99,282.44 : x
  2. Step 2: Convert to fraction form
    121,691.90/182,289.98 = 99,282.44/x
  3. Step 3: Cross multiply
    121,691.90x = 182,289.98 × 99,282.44
  4. Step 4: Simplify right side
    121,691.90x = 18,098,194,001.95
  5. Step 5: Solve for x
    x = 18,098,194,001.95/121,691.90
  6. Step 6: Final answer
    x = 148,721.44

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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.