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Finding the Third Proportional to 65.72 and 98.59

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Solution

The third proportional to 65.72 and 98.59 is: 147.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.72 : 98.59 = 98.59 : x
  2. Step 2: Convert to fraction form
    65.72/98.59 = 98.59/x
  3. Step 3: Cross multiply
    65.72x = 98.59 × 98.59
  4. Step 4: Simplify right side
    65.72x = 9,720.73
  5. Step 5: Solve for x
    x = 9,720.73/65.72
  6. Step 6: Final answer
    x = 147.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.