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Finding the Third Proportional to 31,329 and 68,861.25

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Solution

The third proportional to 31,329 and 68,861.25 is: 151,357.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,329 : 68,861.25 = 68,861.25 : x
  2. Step 2: Convert to fraction form
    31,329/68,861.25 = 68,861.25/x
  3. Step 3: Cross multiply
    31,329x = 68,861.25 × 68,861.25
  4. Step 4: Simplify right side
    31,329x = 4,741,871,751.56
  5. Step 5: Solve for x
    x = 4,741,871,751.56/31,329
  6. Step 6: Final answer
    x = 151,357.26

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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.