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Finding the Fourth Proportional to 121,632.62, 182,374.40 and 42,755.90

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Solution

The fourth proportional to 121,632.62, 182,374.40 and 42,755.90 is: 64,107.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,632.62 : 182,374.40 = 42,755.90 : x
  2. Step 2: Convert to fraction form
    121,632.62/182,374.40 = 42,755.90/x
  3. Step 3: Cross multiply
    121,632.62x = 182,374.40 × 42,755.90
  4. Step 4: Simplify right side
    121,632.62x = 7,797,581,608.96
  5. Step 5: Solve for x
    x = 7,797,581,608.96/121,632.62
  6. Step 6: Final answer
    x = 64,107.65

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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.