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Finding the Third Proportional to 79.50 and 161.75

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Solution

The third proportional to 79.50 and 161.75 is: 329.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.50 : 161.75 = 161.75 : x
  2. Step 2: Convert to fraction form
    79.50/161.75 = 161.75/x
  3. Step 3: Cross multiply
    79.50x = 161.75 × 161.75
  4. Step 4: Simplify right side
    79.50x = 26,163.06
  5. Step 5: Solve for x
    x = 26,163.06/79.50
  6. Step 6: Final answer
    x = 329.10

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.