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Finding the Fourth Proportional to 97.29, 133.96 and 84.15

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Solution

The fourth proportional to 97.29, 133.96 and 84.15 is: 115.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.29 : 133.96 = 84.15 : x
  2. Step 2: Convert to fraction form
    97.29/133.96 = 84.15/x
  3. Step 3: Cross multiply
    97.29x = 133.96 × 84.15
  4. Step 4: Simplify right side
    97.29x = 11,272.75
  5. Step 5: Solve for x
    x = 11,272.75/97.29
  6. Step 6: Final answer
    x = 115.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.