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Finding the Third Proportional to 114.05 and 138.09

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Solution

The third proportional to 114.05 and 138.09 is: 167.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.05 : 138.09 = 138.09 : x
  2. Step 2: Convert to fraction form
    114.05/138.09 = 138.09/x
  3. Step 3: Cross multiply
    114.05x = 138.09 × 138.09
  4. Step 4: Simplify right side
    114.05x = 19,069.88
  5. Step 5: Solve for x
    x = 19,069.88/114.05
  6. Step 6: Final answer
    x = 167.21

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.