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Finding the Third Proportional to 81 and 154.13

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Solution

The third proportional to 81 and 154.13 is: 293.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81 : 154.13 = 154.13 : x
  2. Step 2: Convert to fraction form
    81/154.13 = 154.13/x
  3. Step 3: Cross multiply
    81x = 154.13 × 154.13
  4. Step 4: Simplify right side
    81x = 23,754.52
  5. Step 5: Solve for x
    x = 23,754.52/81
  6. Step 6: Final answer
    x = 293.27

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.