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Finding the Third Proportional to 81,920 and 172,584

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Solution

The third proportional to 81,920 and 172,584 is: 363,589.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,920 : 172,584 = 172,584 : x
  2. Step 2: Convert to fraction form
    81,920/172,584 = 172,584/x
  3. Step 3: Cross multiply
    81,920x = 172,584 × 172,584
  4. Step 4: Simplify right side
    81,920x = 29,785,237,056
  5. Step 5: Solve for x
    x = 29,785,237,056/81,920
  6. Step 6: Final answer
    x = 363,589.32

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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.