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Finding the Third Proportional to 77,289 and 162,879

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Solution

The third proportional to 77,289 and 162,879 is: 343,251.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,289 : 162,879 = 162,879 : x
  2. Step 2: Convert to fraction form
    77,289/162,879 = 162,879/x
  3. Step 3: Cross multiply
    77,289x = 162,879 × 162,879
  4. Step 4: Simplify right side
    77,289x = 26,529,568,641
  5. Step 5: Solve for x
    x = 26,529,568,641/77,289
  6. Step 6: Final answer
    x = 343,251.54

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.