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Finding the Third Proportional to 78.88 and 167.75

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Solution

The third proportional to 78.88 and 167.75 is: 356.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.88 : 167.75 = 167.75 : x
  2. Step 2: Convert to fraction form
    78.88/167.75 = 167.75/x
  3. Step 3: Cross multiply
    78.88x = 167.75 × 167.75
  4. Step 4: Simplify right side
    78.88x = 28,140.06
  5. Step 5: Solve for x
    x = 28,140.06/78.88
  6. Step 6: Final answer
    x = 356.77

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.