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Finding the Fourth Proportional to 138.16, 206.24 and 132.26

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Solution

The fourth proportional to 138.16, 206.24 and 132.26 is: 197.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.16 : 206.24 = 132.26 : x
  2. Step 2: Convert to fraction form
    138.16/206.24 = 132.26/x
  3. Step 3: Cross multiply
    138.16x = 206.24 × 132.26
  4. Step 4: Simplify right side
    138.16x = 27,277.30
  5. Step 5: Solve for x
    x = 27,277.30/138.16
  6. Step 6: Final answer
    x = 197.43

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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.