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Finding the Third Proportional to 91 and 101

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Solution

The third proportional to 91 and 101 is: 112.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91 : 101 = 101 : x
  2. Step 2: Convert to fraction form
    91/101 = 101/x
  3. Step 3: Cross multiply
    91x = 101 × 101
  4. Step 4: Simplify right side
    91x = 10,201
  5. Step 5: Solve for x
    x = 10,201/91
  6. Step 6: Final answer
    x = 112.10

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.