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Finding the Third Proportional to 52,640 and 78,711

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Solution

The third proportional to 52,640 and 78,711 is: 117,694.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,640 : 78,711 = 78,711 : x
  2. Step 2: Convert to fraction form
    52,640/78,711 = 78,711/x
  3. Step 3: Cross multiply
    52,640x = 78,711 × 78,711
  4. Step 4: Simplify right side
    52,640x = 6,195,421,521
  5. Step 5: Solve for x
    x = 6,195,421,521/52,640
  6. Step 6: Final answer
    x = 117,694.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.