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Finding the Fourth Proportional to 129,672.62, 194,158.20 and 67,211.90

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Solution

The fourth proportional to 129,672.62, 194,158.20 and 67,211.90 is: 100,636.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,672.62 : 194,158.20 = 67,211.90 : x
  2. Step 2: Convert to fraction form
    129,672.62/194,158.20 = 67,211.90/x
  3. Step 3: Cross multiply
    129,672.62x = 194,158.20 × 67,211.90
  4. Step 4: Simplify right side
    129,672.62x = 13,049,741,522.58
  5. Step 5: Solve for x
    x = 13,049,741,522.58/129,672.62
  6. Step 6: Final answer
    x = 100,636.06

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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.