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Finding the Third Proportional to 42 and 108.94

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Solution

The third proportional to 42 and 108.94 is: 282.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    42 : 108.94 = 108.94 : x
  2. Step 2: Convert to fraction form
    42/108.94 = 108.94/x
  3. Step 3: Cross multiply
    42x = 108.94 × 108.94
  4. Step 4: Simplify right side
    42x = 11,867.38
  5. Step 5: Solve for x
    x = 11,867.38/42
  6. Step 6: Final answer
    x = 282.56

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Why These Related Problems?

These problems maintain the same ratio (2.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.