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Finding the Fourth Proportional to 215,161.44, 322,743.60 and 74,919.60

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Solution

The fourth proportional to 215,161.44, 322,743.60 and 74,919.60 is: 112,379.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,161.44 : 322,743.60 = 74,919.60 : x
  2. Step 2: Convert to fraction form
    215,161.44/322,743.60 = 74,919.60/x
  3. Step 3: Cross multiply
    215,161.44x = 322,743.60 × 74,919.60
  4. Step 4: Simplify right side
    215,161.44x = 24,179,821,414.56
  5. Step 5: Solve for x
    x = 24,179,821,414.56/215,161.44
  6. Step 6: Final answer
    x = 112,379.90

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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.