Home / 327,680.30-491,711.51-138,129.06

Finding the Fourth Proportional to 327,680.30, 491,711.51 and 138,129.06

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Solution

The fourth proportional to 327,680.30, 491,711.51 and 138,129.06 is: 207,274.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,680.30 : 491,711.51 = 138,129.06 : x
  2. Step 2: Convert to fraction form
    327,680.30/491,711.51 = 138,129.06/x
  3. Step 3: Cross multiply
    327,680.30x = 491,711.51 × 138,129.06
  4. Step 4: Simplify right side
    327,680.30x = 67,919,650,856.72
  5. Step 5: Solve for x
    x = 67,919,650,856.72/327,680.30
  6. Step 6: Final answer
    x = 207,274.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.