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Finding the Third Proportional to 40.25 and 87.81

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Solution

The third proportional to 40.25 and 87.81 is: 191.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.25 : 87.81 = 87.81 : x
  2. Step 2: Convert to fraction form
    40.25/87.81 = 87.81/x
  3. Step 3: Cross multiply
    40.25x = 87.81 × 87.81
  4. Step 4: Simplify right side
    40.25x = 7,711.04
  5. Step 5: Solve for x
    x = 7,711.04/40.25
  6. Step 6: Final answer
    x = 191.58

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.