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Finding the Third Proportional to 38,821 and 84,116

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Solution

The third proportional to 38,821 and 84,116 is: 182,259.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,821 : 84,116 = 84,116 : x
  2. Step 2: Convert to fraction form
    38,821/84,116 = 84,116/x
  3. Step 3: Cross multiply
    38,821x = 84,116 × 84,116
  4. Step 4: Simplify right side
    38,821x = 7,075,501,456
  5. Step 5: Solve for x
    x = 7,075,501,456/38,821
  6. Step 6: Final answer
    x = 182,259.64

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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.