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Finding the Third Proportional to 84.43 and 127.90

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Solution

The third proportional to 84.43 and 127.90 is: 193.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.43 : 127.90 = 127.90 : x
  2. Step 2: Convert to fraction form
    84.43/127.90 = 127.90/x
  3. Step 3: Cross multiply
    84.43x = 127.90 × 127.90
  4. Step 4: Simplify right side
    84.43x = 16,358.01
  5. Step 5: Solve for x
    x = 16,358.01/84.43
  6. Step 6: Final answer
    x = 193.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.