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Finding the Third Proportional to 68,644 and 103,690

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Solution

The third proportional to 68,644 and 103,690 is: 156,628.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,644 : 103,690 = 103,690 : x
  2. Step 2: Convert to fraction form
    68,644/103,690 = 103,690/x
  3. Step 3: Cross multiply
    68,644x = 103,690 × 103,690
  4. Step 4: Simplify right side
    68,644x = 10,751,616,100
  5. Step 5: Solve for x
    x = 10,751,616,100/68,644
  6. Step 6: Final answer
    x = 156,628.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.