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Finding the Third Proportional to 43,638 and 69,210

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Solution

The third proportional to 43,638 and 69,210 is: 109,767.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,638 : 69,210 = 69,210 : x
  2. Step 2: Convert to fraction form
    43,638/69,210 = 69,210/x
  3. Step 3: Cross multiply
    43,638x = 69,210 × 69,210
  4. Step 4: Simplify right side
    43,638x = 4,790,024,100
  5. Step 5: Solve for x
    x = 4,790,024,100/43,638
  6. Step 6: Final answer
    x = 109,767.27

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.