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Finding the Fourth Proportional to 121,691.65, 182,289.61 and 99,282.19

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Solution

The fourth proportional to 121,691.65, 182,289.61 and 99,282.19 is: 148,721.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,691.65 : 182,289.61 = 99,282.19 : x
  2. Step 2: Convert to fraction form
    121,691.65/182,289.61 = 99,282.19/x
  3. Step 3: Cross multiply
    121,691.65x = 182,289.61 × 99,282.19
  4. Step 4: Simplify right side
    121,691.65x = 18,098,111,198.64
  5. Step 5: Solve for x
    x = 18,098,111,198.64/121,691.65
  6. Step 6: Final answer
    x = 148,721.06

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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.