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Finding the Third Proportional to 86,256 and 129,672

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Solution

The third proportional to 86,256 and 129,672 is: 194,940.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,256 : 129,672 = 129,672 : x
  2. Step 2: Convert to fraction form
    86,256/129,672 = 129,672/x
  3. Step 3: Cross multiply
    86,256x = 129,672 × 129,672
  4. Step 4: Simplify right side
    86,256x = 16,814,827,584
  5. Step 5: Solve for x
    x = 16,814,827,584/86,256
  6. Step 6: Final answer
    x = 194,940.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.