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Finding the Fourth Proportional to 138.29, 207.20 and 97.62

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Solution

The fourth proportional to 138.29, 207.20 and 97.62 is: 146.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.29 : 207.20 = 97.62 : x
  2. Step 2: Convert to fraction form
    138.29/207.20 = 97.62/x
  3. Step 3: Cross multiply
    138.29x = 207.20 × 97.62
  4. Step 4: Simplify right side
    138.29x = 20,226.74
  5. Step 5: Solve for x
    x = 20,226.74/138.29
  6. Step 6: Final answer
    x = 146.27

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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.