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Finding the Third Proportional to 51,518.25 and 81,732

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Solution

The third proportional to 51,518.25 and 81,732 is: 129,665.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,518.25 : 81,732 = 81,732 : x
  2. Step 2: Convert to fraction form
    51,518.25/81,732 = 81,732/x
  3. Step 3: Cross multiply
    51,518.25x = 81,732 × 81,732
  4. Step 4: Simplify right side
    51,518.25x = 6,680,119,824
  5. Step 5: Solve for x
    x = 6,680,119,824/51,518.25
  6. Step 6: Final answer
    x = 129,665.12

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.