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Finding the Third Proportional to 38,671.50 and 81,489

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Solution

The third proportional to 38,671.50 and 81,489 is: 171,714.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,671.50 : 81,489 = 81,489 : x
  2. Step 2: Convert to fraction form
    38,671.50/81,489 = 81,489/x
  3. Step 3: Cross multiply
    38,671.50x = 81,489 × 81,489
  4. Step 4: Simplify right side
    38,671.50x = 6,640,457,121
  5. Step 5: Solve for x
    x = 6,640,457,121/38,671.50
  6. Step 6: Final answer
    x = 171,714.50

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.