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Finding the Third Proportional to 16,672 and 36,128

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Solution

The third proportional to 16,672 and 36,128 is: 78,288.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,672 : 36,128 = 36,128 : x
  2. Step 2: Convert to fraction form
    16,672/36,128 = 36,128/x
  3. Step 3: Cross multiply
    16,672x = 36,128 × 36,128
  4. Step 4: Simplify right side
    16,672x = 1,305,232,384
  5. Step 5: Solve for x
    x = 1,305,232,384/16,672
  6. Step 6: Final answer
    x = 78,288.89

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.