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Finding the Third Proportional to 31,106 and 68,530

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Solution

The third proportional to 31,106 and 68,530 is: 150,979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,106 : 68,530 = 68,530 : x
  2. Step 2: Convert to fraction form
    31,106/68,530 = 68,530/x
  3. Step 3: Cross multiply
    31,106x = 68,530 × 68,530
  4. Step 4: Simplify right side
    31,106x = 4,696,360,900
  5. Step 5: Solve for x
    x = 4,696,360,900/31,106
  6. Step 6: Final answer
    x = 150,979.26

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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.