Home / 129,419.52-194,129.42-40,680.78

Finding the Fourth Proportional to 129,419.52, 194,129.42 and 40,680.78

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Solution

The fourth proportional to 129,419.52, 194,129.42 and 40,680.78 is: 61,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,419.52 : 194,129.42 = 40,680.78 : x
  2. Step 2: Convert to fraction form
    129,419.52/194,129.42 = 40,680.78/x
  3. Step 3: Cross multiply
    129,419.52x = 194,129.42 × 40,680.78
  4. Step 4: Simplify right side
    129,419.52x = 7,897,336,023.14
  5. Step 5: Solve for x
    x = 7,897,336,023.14/129,419.52
  6. Step 6: Final answer
    x = 61,021.21

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1.5x scale

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.