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Finding the Third Proportional to 81.75 and 179.25

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Solution

The third proportional to 81.75 and 179.25 is: 393.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.75 : 179.25 = 179.25 : x
  2. Step 2: Convert to fraction form
    81.75/179.25 = 179.25/x
  3. Step 3: Cross multiply
    81.75x = 179.25 × 179.25
  4. Step 4: Simplify right side
    81.75x = 32,130.56
  5. Step 5: Solve for x
    x = 32,130.56/81.75
  6. Step 6: Final answer
    x = 393.03

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.