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Finding the Third Proportional to 31,215.75 and 68,793.75

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Solution

The third proportional to 31,215.75 and 68,793.75 is: 151,608.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,215.75 : 68,793.75 = 68,793.75 : x
  2. Step 2: Convert to fraction form
    31,215.75/68,793.75 = 68,793.75/x
  3. Step 3: Cross multiply
    31,215.75x = 68,793.75 × 68,793.75
  4. Step 4: Simplify right side
    31,215.75x = 4,732,580,039.06
  5. Step 5: Solve for x
    x = 4,732,580,039.06/31,215.75
  6. Step 6: Final answer
    x = 151,608.72

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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.