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Finding the Third Proportional to 66.38 and 92.38

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Solution

The third proportional to 66.38 and 92.38 is: 128.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.38 : 92.38 = 92.38 : x
  2. Step 2: Convert to fraction form
    66.38/92.38 = 92.38/x
  3. Step 3: Cross multiply
    66.38x = 92.38 × 92.38
  4. Step 4: Simplify right side
    66.38x = 8,533.14
  5. Step 5: Solve for x
    x = 8,533.14/66.38
  6. Step 6: Final answer
    x = 128.56

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.