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Finding the Third Proportional to 111.63 and 163.38

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Solution

The third proportional to 111.63 and 163.38 is: 239.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.63 : 163.38 = 163.38 : x
  2. Step 2: Convert to fraction form
    111.63/163.38 = 163.38/x
  3. Step 3: Cross multiply
    111.63x = 163.38 × 163.38
  4. Step 4: Simplify right side
    111.63x = 26,691.39
  5. Step 5: Solve for x
    x = 26,691.39/111.63
  6. Step 6: Final answer
    x = 239.12

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.