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Finding the Fourth Proportional to 129.82, 193.69 and 116.18

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Solution

The fourth proportional to 129.82, 193.69 and 116.18 is: 173.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.82 : 193.69 = 116.18 : x
  2. Step 2: Convert to fraction form
    129.82/193.69 = 116.18/x
  3. Step 3: Cross multiply
    129.82x = 193.69 × 116.18
  4. Step 4: Simplify right side
    129.82x = 22,502.90
  5. Step 5: Solve for x
    x = 22,502.90/129.82
  6. Step 6: Final answer
    x = 173.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.