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Finding the Third Proportional to 36,519 and 78,489

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Solution

The third proportional to 36,519 and 78,489 is: 168,693.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,519 : 78,489 = 78,489 : x
  2. Step 2: Convert to fraction form
    36,519/78,489 = 78,489/x
  3. Step 3: Cross multiply
    36,519x = 78,489 × 78,489
  4. Step 4: Simplify right side
    36,519x = 6,160,523,121
  5. Step 5: Solve for x
    x = 6,160,523,121/36,519
  6. Step 6: Final answer
    x = 168,693.64

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.