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Finding the Third Proportional to 31.11 and 72.14

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Solution

The third proportional to 31.11 and 72.14 is: 167.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.11 : 72.14 = 72.14 : x
  2. Step 2: Convert to fraction form
    31.11/72.14 = 72.14/x
  3. Step 3: Cross multiply
    31.11x = 72.14 × 72.14
  4. Step 4: Simplify right side
    31.11x = 5,204.27
  5. Step 5: Solve for x
    x = 5,204.27/31.11
  6. Step 6: Final answer
    x = 167.27

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.