Home / 231,417.13-319,385.20-129,448.26

Finding the Fourth Proportional to 231,417.13, 319,385.20 and 129,448.26

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Solution

The fourth proportional to 231,417.13, 319,385.20 and 129,448.26 is: 178,655.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,417.13 : 319,385.20 = 129,448.26 : x
  2. Step 2: Convert to fraction form
    231,417.13/319,385.20 = 129,448.26/x
  3. Step 3: Cross multiply
    231,417.13x = 319,385.20 × 129,448.26
  4. Step 4: Simplify right side
    231,417.13x = 41,343,856,812.83
  5. Step 5: Solve for x
    x = 41,343,856,812.83/231,417.13
  6. Step 6: Final answer
    x = 178,655.13

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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.