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Finding the Third Proportional to 122 and 161.75

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Solution

The third proportional to 122 and 161.75 is: 214.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    122 : 161.75 = 161.75 : x
  2. Step 2: Convert to fraction form
    122/161.75 = 161.75/x
  3. Step 3: Cross multiply
    122x = 161.75 × 161.75
  4. Step 4: Simplify right side
    122x = 26,163.06
  5. Step 5: Solve for x
    x = 26,163.06/122
  6. Step 6: Final answer
    x = 214.45

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.