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Finding the Third Proportional to 31,186 and 68,600

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Solution

The third proportional to 31,186 and 68,600 is: 150,899.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,186 : 68,600 = 68,600 : x
  2. Step 2: Convert to fraction form
    31,186/68,600 = 68,600/x
  3. Step 3: Cross multiply
    31,186x = 68,600 × 68,600
  4. Step 4: Simplify right side
    31,186x = 4,705,960,000
  5. Step 5: Solve for x
    x = 4,705,960,000/31,186
  6. Step 6: Final answer
    x = 150,899.76

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.