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Finding the Third Proportional to 125.94 and 138.31

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Solution

The third proportional to 125.94 and 138.31 is: 151.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.94 : 138.31 = 138.31 : x
  2. Step 2: Convert to fraction form
    125.94/138.31 = 138.31/x
  3. Step 3: Cross multiply
    125.94x = 138.31 × 138.31
  4. Step 4: Simplify right side
    125.94x = 19,130.35
  5. Step 5: Solve for x
    x = 19,130.35/125.94
  6. Step 6: Final answer
    x = 151.90

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.