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Finding the Fourth Proportional to 231,438.48, 319,414.68 and 129,469.60

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Solution

The fourth proportional to 231,438.48, 319,414.68 and 129,469.60 is: 178,684.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,438.48 : 319,414.68 = 129,469.60 : x
  2. Step 2: Convert to fraction form
    231,438.48/319,414.68 = 129,469.60/x
  3. Step 3: Cross multiply
    231,438.48x = 319,414.68 × 129,469.60
  4. Step 4: Simplify right side
    231,438.48x = 41,354,490,853.73
  5. Step 5: Solve for x
    x = 41,354,490,853.73/231,438.48
  6. Step 6: Final answer
    x = 178,684.59

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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.