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Finding the Third Proportional to 79.31 and 171.13

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Solution

The third proportional to 79.31 and 171.13 is: 369.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.31 : 171.13 = 171.13 : x
  2. Step 2: Convert to fraction form
    79.31/171.13 = 171.13/x
  3. Step 3: Cross multiply
    79.31x = 171.13 × 171.13
  4. Step 4: Simplify right side
    79.31x = 29,283.77
  5. Step 5: Solve for x
    x = 29,283.77/79.31
  6. Step 6: Final answer
    x = 369.22

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.