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Finding the Third Proportional to 111.09 and 163.13

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Solution

The third proportional to 111.09 and 163.13 is: 239.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.09 : 163.13 = 163.13 : x
  2. Step 2: Convert to fraction form
    111.09/163.13 = 163.13/x
  3. Step 3: Cross multiply
    111.09x = 163.13 × 163.13
  4. Step 4: Simplify right side
    111.09x = 26,609.77
  5. Step 5: Solve for x
    x = 26,609.77/111.09
  6. Step 6: Final answer
    x = 239.53

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.