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Finding the Fourth Proportional to 321,149.39, 481,722.62 and 81,265.56

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Solution

The fourth proportional to 321,149.39, 481,722.62 and 81,265.56 is: 121,897.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,149.39 : 481,722.62 = 81,265.56 : x
  2. Step 2: Convert to fraction form
    321,149.39/481,722.62 = 81,265.56/x
  3. Step 3: Cross multiply
    321,149.39x = 481,722.62 × 81,265.56
  4. Step 4: Simplify right side
    321,149.39x = 39,147,458,072.64
  5. Step 5: Solve for x
    x = 39,147,458,072.64/321,149.39
  6. Step 6: Final answer
    x = 121,897.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.