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Finding the Fourth Proportional to 231,493.06, 319,472.85 and 129,512.45

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Solution

The fourth proportional to 231,493.06, 319,472.85 and 129,512.45 is: 178,734.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,493.06 : 319,472.85 = 129,512.45 : x
  2. Step 2: Convert to fraction form
    231,493.06/319,472.85 = 129,512.45/x
  3. Step 3: Cross multiply
    231,493.06x = 319,472.85 × 129,512.45
  4. Step 4: Simplify right side
    231,493.06x = 41,375,712,432.08
  5. Step 5: Solve for x
    x = 41,375,712,432.08/231,493.06
  6. Step 6: Final answer
    x = 178,734.13

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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.