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Finding the Third Proportional to 81 and 151.88

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Solution

The third proportional to 81 and 151.88 is: 284.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81 : 151.88 = 151.88 : x
  2. Step 2: Convert to fraction form
    81/151.88 = 151.88/x
  3. Step 3: Cross multiply
    81x = 151.88 × 151.88
  4. Step 4: Simplify right side
    81x = 23,066.02
  5. Step 5: Solve for x
    x = 23,066.02/81
  6. Step 6: Final answer
    x = 284.77

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.