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Finding the Fourth Proportional to 231,498.54, 319,480.36 and 129,517.92

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Solution

The fourth proportional to 231,498.54, 319,480.36 and 129,517.92 is: 178,741.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,498.54 : 319,480.36 = 129,517.92 : x
  2. Step 2: Convert to fraction form
    231,498.54/319,480.36 = 129,517.92/x
  3. Step 3: Cross multiply
    231,498.54x = 319,480.36 × 129,517.92
  4. Step 4: Simplify right side
    231,498.54x = 41,378,431,708.05
  5. Step 5: Solve for x
    x = 41,378,431,708.05/231,498.54
  6. Step 6: Final answer
    x = 178,741.65

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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.