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Finding the Fourth Proportional to 129.25, 193.87 and 60.74

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Solution

The fourth proportional to 129.25, 193.87 and 60.74 is: 91.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.25 : 193.87 = 60.74 : x
  2. Step 2: Convert to fraction form
    129.25/193.87 = 60.74/x
  3. Step 3: Cross multiply
    129.25x = 193.87 × 60.74
  4. Step 4: Simplify right side
    129.25x = 11,775.66
  5. Step 5: Solve for x
    x = 11,775.66/129.25
  6. Step 6: Final answer
    x = 91.11

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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.