Home / 231,419.35-319,388.28-129,450.49

Finding the Fourth Proportional to 231,419.35, 319,388.28 and 129,450.49

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Solution

The fourth proportional to 231,419.35, 319,388.28 and 129,450.49 is: 178,658.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,419.35 : 319,388.28 = 129,450.49 : x
  2. Step 2: Convert to fraction form
    231,419.35/319,388.28 = 129,450.49/x
  3. Step 3: Cross multiply
    231,419.35x = 319,388.28 × 129,450.49
  4. Step 4: Simplify right side
    231,419.35x = 41,344,969,346.26
  5. Step 5: Solve for x
    x = 41,344,969,346.26/231,419.35
  6. Step 6: Final answer
    x = 178,658.22

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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.