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Finding the Third Proportional to 81,888 and 172,472

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Solution

The third proportional to 81,888 and 172,472 is: 363,259.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,888 : 172,472 = 172,472 : x
  2. Step 2: Convert to fraction form
    81,888/172,472 = 172,472/x
  3. Step 3: Cross multiply
    81,888x = 172,472 × 172,472
  4. Step 4: Simplify right side
    81,888x = 29,746,590,784
  5. Step 5: Solve for x
    x = 29,746,590,784/81,888
  6. Step 6: Final answer
    x = 363,259.46

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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.