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Finding the Third Proportional to 138,700 and 213,234

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Solution

The third proportional to 138,700 and 213,234 is: 327,820.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,700 : 213,234 = 213,234 : x
  2. Step 2: Convert to fraction form
    138,700/213,234 = 213,234/x
  3. Step 3: Cross multiply
    138,700x = 213,234 × 213,234
  4. Step 4: Simplify right side
    138,700x = 45,468,738,756
  5. Step 5: Solve for x
    x = 45,468,738,756/138,700
  6. Step 6: Final answer
    x = 327,820.76

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.