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Finding the Third Proportional to 77,987 and 159,663

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Solution

The third proportional to 77,987 and 159,663 is: 326,878.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,987 : 159,663 = 159,663 : x
  2. Step 2: Convert to fraction form
    77,987/159,663 = 159,663/x
  3. Step 3: Cross multiply
    77,987x = 159,663 × 159,663
  4. Step 4: Simplify right side
    77,987x = 25,492,273,569
  5. Step 5: Solve for x
    x = 25,492,273,569/77,987
  6. Step 6: Final answer
    x = 326,878.50

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.