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Finding the Third Proportional to 43,872 and 64,170

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Solution

The third proportional to 43,872 and 64,170 is: 93,859.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,872 : 64,170 = 64,170 : x
  2. Step 2: Convert to fraction form
    43,872/64,170 = 64,170/x
  3. Step 3: Cross multiply
    43,872x = 64,170 × 64,170
  4. Step 4: Simplify right side
    43,872x = 4,117,788,900
  5. Step 5: Solve for x
    x = 4,117,788,900/43,872
  6. Step 6: Final answer
    x = 93,859.16

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.