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Finding the Third Proportional to 86,319 and 131,280

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Solution

The third proportional to 86,319 and 131,280 is: 199,659.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,319 : 131,280 = 131,280 : x
  2. Step 2: Convert to fraction form
    86,319/131,280 = 131,280/x
  3. Step 3: Cross multiply
    86,319x = 131,280 × 131,280
  4. Step 4: Simplify right side
    86,319x = 17,234,438,400
  5. Step 5: Solve for x
    x = 17,234,438,400/86,319
  6. Step 6: Final answer
    x = 199,659.85

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.