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Finding the Third Proportional to 43.25 and 66.47

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Solution

The third proportional to 43.25 and 66.47 is: 102.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.25 : 66.47 = 66.47 : x
  2. Step 2: Convert to fraction form
    43.25/66.47 = 66.47/x
  3. Step 3: Cross multiply
    43.25x = 66.47 × 66.47
  4. Step 4: Simplify right side
    43.25x = 4,418.09
  5. Step 5: Solve for x
    x = 4,418.09/43.25
  6. Step 6: Final answer
    x = 102.15

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.