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Finding the Third Proportional to 87,372 and 130,920

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Solution

The third proportional to 87,372 and 130,920 is: 196,173.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,372 : 130,920 = 130,920 : x
  2. Step 2: Convert to fraction form
    87,372/130,920 = 130,920/x
  3. Step 3: Cross multiply
    87,372x = 130,920 × 130,920
  4. Step 4: Simplify right side
    87,372x = 17,140,046,400
  5. Step 5: Solve for x
    x = 17,140,046,400/87,372
  6. Step 6: Final answer
    x = 196,173.22

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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.