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Finding the Third Proportional to 91.13 and 116.44

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Solution

The third proportional to 91.13 and 116.44 is: 148.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.13 : 116.44 = 116.44 : x
  2. Step 2: Convert to fraction form
    91.13/116.44 = 116.44/x
  3. Step 3: Cross multiply
    91.13x = 116.44 × 116.44
  4. Step 4: Simplify right side
    91.13x = 13,557.69
  5. Step 5: Solve for x
    x = 13,557.69/91.13
  6. Step 6: Final answer
    x = 148.78

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.