Home / 231,213.18-319,073.27-129,238.53

Finding the Fourth Proportional to 231,213.18, 319,073.27 and 129,238.53

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Solution

The fourth proportional to 231,213.18, 319,073.27 and 129,238.53 is: 178,348.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,213.18 : 319,073.27 = 129,238.53 : x
  2. Step 2: Convert to fraction form
    231,213.18/319,073.27 = 129,238.53/x
  3. Step 3: Cross multiply
    231,213.18x = 319,073.27 × 129,238.53
  4. Step 4: Simplify right side
    231,213.18x = 41,236,559,730.90
  5. Step 5: Solve for x
    x = 41,236,559,730.90/231,213.18
  6. Step 6: Final answer
    x = 178,348.66

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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.