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Finding the Fourth Proportional to 129,766.96, 194,589.96 and 67,420.72

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Solution

The fourth proportional to 129,766.96, 194,589.96 and 67,420.72 is: 101,099.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,766.96 : 194,589.96 = 67,420.72 : x
  2. Step 2: Convert to fraction form
    129,766.96/194,589.96 = 67,420.72/x
  3. Step 3: Cross multiply
    129,766.96x = 194,589.96 × 67,420.72
  4. Step 4: Simplify right side
    129,766.96x = 13,119,395,207.97
  5. Step 5: Solve for x
    x = 13,119,395,207.97/129,766.96
  6. Step 6: Final answer
    x = 101,099.66

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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.