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Finding the Third Proportional to 68.94 and 135.88

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Solution

The third proportional to 68.94 and 135.88 is: 267.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.94 : 135.88 = 135.88 : x
  2. Step 2: Convert to fraction form
    68.94/135.88 = 135.88/x
  3. Step 3: Cross multiply
    68.94x = 135.88 × 135.88
  4. Step 4: Simplify right side
    68.94x = 18,462.02
  5. Step 5: Solve for x
    x = 18,462.02/68.94
  6. Step 6: Final answer
    x = 267.81

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.