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Finding the Third Proportional to 122.44 and 172.19

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Solution

The third proportional to 122.44 and 172.19 is: 242.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.44 : 172.19 = 172.19 : x
  2. Step 2: Convert to fraction form
    122.44/172.19 = 172.19/x
  3. Step 3: Cross multiply
    122.44x = 172.19 × 172.19
  4. Step 4: Simplify right side
    122.44x = 29,648.54
  5. Step 5: Solve for x
    x = 29,648.54/122.44
  6. Step 6: Final answer
    x = 242.15

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.