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Finding the Third Proportional to 77,919 and 170,247

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Solution

The third proportional to 77,919 and 170,247 is: 371,976.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,919 : 170,247 = 170,247 : x
  2. Step 2: Convert to fraction form
    77,919/170,247 = 170,247/x
  3. Step 3: Cross multiply
    77,919x = 170,247 × 170,247
  4. Step 4: Simplify right side
    77,919x = 28,984,041,009
  5. Step 5: Solve for x
    x = 28,984,041,009/77,919
  6. Step 6: Final answer
    x = 371,976.55

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.