Home / 231,715.13-319,724.55-129,742.20

Finding the Fourth Proportional to 231,715.13, 319,724.55 and 129,742.20

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Solution

The fourth proportional to 231,715.13, 319,724.55 and 129,742.20 is: 179,020.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,715.13 : 319,724.55 = 129,742.20 : x
  2. Step 2: Convert to fraction form
    231,715.13/319,724.55 = 129,742.20/x
  3. Step 3: Cross multiply
    231,715.13x = 319,724.55 × 129,742.20
  4. Step 4: Simplify right side
    231,715.13x = 41,481,766,511.01
  5. Step 5: Solve for x
    x = 41,481,766,511.01/231,715.13
  6. Step 6: Final answer
    x = 179,020.54

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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.