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Finding the Fourth Proportional to 236,691.67, 326,635.72 and 129,261.71

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Solution

The fourth proportional to 236,691.67, 326,635.72 and 129,261.71 is: 178,381.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,691.67 : 326,635.72 = 129,261.71 : x
  2. Step 2: Convert to fraction form
    236,691.67/326,635.72 = 129,261.71/x
  3. Step 3: Cross multiply
    236,691.67x = 326,635.72 × 129,261.71
  4. Step 4: Simplify right side
    236,691.67x = 42,221,491,714.28
  5. Step 5: Solve for x
    x = 42,221,491,714.28/236,691.67
  6. Step 6: Final answer
    x = 178,381.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.