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Finding the Fourth Proportional to 218,100.87, 300,977.78 and 122,608.35

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Solution

The fourth proportional to 218,100.87, 300,977.78 and 122,608.35 is: 169,198.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,100.87 : 300,977.78 = 122,608.35 : x
  2. Step 2: Convert to fraction form
    218,100.87/300,977.78 = 122,608.35/x
  3. Step 3: Cross multiply
    218,100.87x = 300,977.78 × 122,608.35
  4. Step 4: Simplify right side
    218,100.87x = 36,902,388,379.42
  5. Step 5: Solve for x
    x = 36,902,388,379.42/218,100.87
  6. Step 6: Final answer
    x = 169,198.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.