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Finding the Third Proportional to 138.75 and 202.13

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Solution

The third proportional to 138.75 and 202.13 is: 294.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.75 : 202.13 = 202.13 : x
  2. Step 2: Convert to fraction form
    138.75/202.13 = 202.13/x
  3. Step 3: Cross multiply
    138.75x = 202.13 × 202.13
  4. Step 4: Simplify right side
    138.75x = 40,854.52
  5. Step 5: Solve for x
    x = 40,854.52/138.75
  6. Step 6: Final answer
    x = 294.45

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.