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Finding the Third Proportional to 81,855 and 171,972

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Solution

The third proportional to 81,855 and 171,972 is: 361,301.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,855 : 171,972 = 171,972 : x
  2. Step 2: Convert to fraction form
    81,855/171,972 = 171,972/x
  3. Step 3: Cross multiply
    81,855x = 171,972 × 171,972
  4. Step 4: Simplify right side
    81,855x = 29,574,368,784
  5. Step 5: Solve for x
    x = 29,574,368,784/81,855
  6. Step 6: Final answer
    x = 361,301.92

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.