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Finding the Third Proportional to 77,920 and 116,880

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Solution

The third proportional to 77,920 and 116,880 is: 175,320

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,920 : 116,880 = 116,880 : x
  2. Step 2: Convert to fraction form
    77,920/116,880 = 116,880/x
  3. Step 3: Cross multiply
    77,920x = 116,880 × 116,880
  4. Step 4: Simplify right side
    77,920x = 13,660,934,400
  5. Step 5: Solve for x
    x = 13,660,934,400/77,920
  6. Step 6: Final answer
    x = 175,320

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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.