Home / 231,456.85-319,403.05-129,480.12

Finding the Fourth Proportional to 231,456.85, 319,403.05 and 129,480.12

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Solution

The fourth proportional to 231,456.85, 319,403.05 and 129,480.12 is: 178,678.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,456.85 : 319,403.05 = 129,480.12 : x
  2. Step 2: Convert to fraction form
    231,456.85/319,403.05 = 129,480.12/x
  3. Step 3: Cross multiply
    231,456.85x = 319,403.05 × 129,480.12
  4. Step 4: Simplify right side
    231,456.85x = 41,356,344,675.89
  5. Step 5: Solve for x
    x = 41,356,344,675.89/231,456.85
  6. Step 6: Final answer
    x = 178,678.42

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1.5x scale

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.