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Finding the Third Proportional to 75.75 and 161.34

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Solution

The third proportional to 75.75 and 161.34 is: 343.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.75 : 161.34 = 161.34 : x
  2. Step 2: Convert to fraction form
    75.75/161.34 = 161.34/x
  3. Step 3: Cross multiply
    75.75x = 161.34 × 161.34
  4. Step 4: Simplify right side
    75.75x = 26,031.81
  5. Step 5: Solve for x
    x = 26,031.81/75.75
  6. Step 6: Final answer
    x = 343.65

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.