Home / 231,480.15-319,440.99-129,505.20

Finding the Fourth Proportional to 231,480.15, 319,440.99 and 129,505.20

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Solution

The fourth proportional to 231,480.15, 319,440.99 and 129,505.20 is: 178,716.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,480.15 : 319,440.99 = 129,505.20 : x
  2. Step 2: Convert to fraction form
    231,480.15/319,440.99 = 129,505.20/x
  3. Step 3: Cross multiply
    231,480.15x = 319,440.99 × 129,505.20
  4. Step 4: Simplify right side
    231,480.15x = 41,369,269,298.15
  5. Step 5: Solve for x
    x = 41,369,269,298.15/231,480.15
  6. Step 6: Final answer
    x = 178,716.27

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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.