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Finding the Third Proportional to 55,879 and 121,219

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Solution

The third proportional to 55,879 and 121,219 is: 262,961.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,879 : 121,219 = 121,219 : x
  2. Step 2: Convert to fraction form
    55,879/121,219 = 121,219/x
  3. Step 3: Cross multiply
    55,879x = 121,219 × 121,219
  4. Step 4: Simplify right side
    55,879x = 14,694,045,961
  5. Step 5: Solve for x
    x = 14,694,045,961/55,879
  6. Step 6: Final answer
    x = 262,961.86

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.