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Finding the Third Proportional to 69.61 and 98.86

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Solution

The third proportional to 69.61 and 98.86 is: 140.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.61 : 98.86 = 98.86 : x
  2. Step 2: Convert to fraction form
    69.61/98.86 = 98.86/x
  3. Step 3: Cross multiply
    69.61x = 98.86 × 98.86
  4. Step 4: Simplify right side
    69.61x = 9,773.18
  5. Step 5: Solve for x
    x = 9,773.18/69.61
  6. Step 6: Final answer
    x = 140.40

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.