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Finding the Third Proportional to 72.38 and 167.44

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Solution

The third proportional to 72.38 and 167.44 is: 387.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.38 : 167.44 = 167.44 : x
  2. Step 2: Convert to fraction form
    72.38/167.44 = 167.44/x
  3. Step 3: Cross multiply
    72.38x = 167.44 × 167.44
  4. Step 4: Simplify right side
    72.38x = 28,035.32
  5. Step 5: Solve for x
    x = 28,035.32/72.38
  6. Step 6: Final answer
    x = 387.36

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.