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Finding the Third Proportional to 78,500 and 169,880

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Solution

The third proportional to 78,500 and 169,880 is: 367,633.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,500 : 169,880 = 169,880 : x
  2. Step 2: Convert to fraction form
    78,500/169,880 = 169,880/x
  3. Step 3: Cross multiply
    78,500x = 169,880 × 169,880
  4. Step 4: Simplify right side
    78,500x = 28,859,214,400
  5. Step 5: Solve for x
    x = 28,859,214,400/78,500
  6. Step 6: Final answer
    x = 367,633.30

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.