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Finding the Third Proportional to 89,381 and 138,266

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Solution

The third proportional to 89,381 and 138,266 is: 213,887.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,381 : 138,266 = 138,266 : x
  2. Step 2: Convert to fraction form
    89,381/138,266 = 138,266/x
  3. Step 3: Cross multiply
    89,381x = 138,266 × 138,266
  4. Step 4: Simplify right side
    89,381x = 19,117,486,756
  5. Step 5: Solve for x
    x = 19,117,486,756/89,381
  6. Step 6: Final answer
    x = 213,887.59

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.