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Finding the Third Proportional to 43,212 and 70,561

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Solution

The third proportional to 43,212 and 70,561 is: 115,219.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,212 : 70,561 = 70,561 : x
  2. Step 2: Convert to fraction form
    43,212/70,561 = 70,561/x
  3. Step 3: Cross multiply
    43,212x = 70,561 × 70,561
  4. Step 4: Simplify right side
    43,212x = 4,978,854,721
  5. Step 5: Solve for x
    x = 4,978,854,721/43,212
  6. Step 6: Final answer
    x = 115,219.26

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.