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Finding the Fourth Proportional to 321,494.09, 481,939.40 and 108,112.80

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Solution

The fourth proportional to 321,494.09, 481,939.40 and 108,112.80 is: 162,067.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,494.09 : 481,939.40 = 108,112.80 : x
  2. Step 2: Convert to fraction form
    321,494.09/481,939.40 = 108,112.80/x
  3. Step 3: Cross multiply
    321,494.09x = 481,939.40 × 108,112.80
  4. Step 4: Simplify right side
    321,494.09x = 52,103,817,423.76
  5. Step 5: Solve for x
    x = 52,103,817,423.76/321,494.09
  6. Step 6: Final answer
    x = 162,067.73

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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.