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Finding the Third Proportional to 68.34 and 140.48

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Solution

The third proportional to 68.34 and 140.48 is: 288.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.34 : 140.48 = 140.48 : x
  2. Step 2: Convert to fraction form
    68.34/140.48 = 140.48/x
  3. Step 3: Cross multiply
    68.34x = 140.48 × 140.48
  4. Step 4: Simplify right side
    68.34x = 19,735.86
  5. Step 5: Solve for x
    x = 19,735.86/68.34
  6. Step 6: Final answer
    x = 288.77

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.