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Finding the Fourth Proportional to 129.38, 194.05 and 67.62

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Solution

The fourth proportional to 129.38, 194.05 and 67.62 is: 101.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.38 : 194.05 = 67.62 : x
  2. Step 2: Convert to fraction form
    129.38/194.05 = 67.62/x
  3. Step 3: Cross multiply
    129.38x = 194.05 × 67.62
  4. Step 4: Simplify right side
    129.38x = 13,120.64
  5. Step 5: Solve for x
    x = 13,120.64/129.38
  6. Step 6: Final answer
    x = 101.41

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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.