Home / 231,442.36-319,375.39-129,450.15

Finding the Fourth Proportional to 231,442.36, 319,375.39 and 129,450.15

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Solution

The fourth proportional to 231,442.36, 319,375.39 and 129,450.15 is: 178,632.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,442.36 : 319,375.39 = 129,450.15 : x
  2. Step 2: Convert to fraction form
    231,442.36/319,375.39 = 129,450.15/x
  3. Step 3: Cross multiply
    231,442.36x = 319,375.39 × 129,450.15
  4. Step 4: Simplify right side
    231,442.36x = 41,343,192,141.81
  5. Step 5: Solve for x
    x = 41,343,192,141.81/231,442.36
  6. Step 6: Final answer
    x = 178,632.78

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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.