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Finding the Fourth Proportional to 138.46, 191.15 and 97.14

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Solution

The fourth proportional to 138.46, 191.15 and 97.14 is: 134.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.46 : 191.15 = 97.14 : x
  2. Step 2: Convert to fraction form
    138.46/191.15 = 97.14/x
  3. Step 3: Cross multiply
    138.46x = 191.15 × 97.14
  4. Step 4: Simplify right side
    138.46x = 18,568.31
  5. Step 5: Solve for x
    x = 18,568.31/138.46
  6. Step 6: Final answer
    x = 134.11

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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.