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Finding the Third Proportional to 66.88 and 101.63

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Solution

The third proportional to 66.88 and 101.63 is: 154.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.88 : 101.63 = 101.63 : x
  2. Step 2: Convert to fraction form
    66.88/101.63 = 101.63/x
  3. Step 3: Cross multiply
    66.88x = 101.63 × 101.63
  4. Step 4: Simplify right side
    66.88x = 10,327.64
  5. Step 5: Solve for x
    x = 10,327.64/66.88
  6. Step 6: Final answer
    x = 154.43

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.