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Finding the Third Proportional to 84.88 and 135.13

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Solution

The third proportional to 84.88 and 135.13 is: 215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.88 : 135.13 = 135.13 : x
  2. Step 2: Convert to fraction form
    84.88/135.13 = 135.13/x
  3. Step 3: Cross multiply
    84.88x = 135.13 × 135.13
  4. Step 4: Simplify right side
    84.88x = 18,258.77
  5. Step 5: Solve for x
    x = 18,258.77/84.88
  6. Step 6: Final answer
    x = 215.13

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.