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Finding the Third Proportional to 123 and 172.22

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Solution

The third proportional to 123 and 172.22 is: 241.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    123 : 172.22 = 172.22 : x
  2. Step 2: Convert to fraction form
    123/172.22 = 172.22/x
  3. Step 3: Cross multiply
    123x = 172.22 × 172.22
  4. Step 4: Simplify right side
    123x = 29,659.30
  5. Step 5: Solve for x
    x = 29,659.30/123
  6. Step 6: Final answer
    x = 241.13

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.