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Finding the Fourth Proportional to 72,198.48, 108,313.17 and 21,601.47

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Solution

The fourth proportional to 72,198.48, 108,313.17 and 21,601.47 is: 32,406.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,198.48 : 108,313.17 = 21,601.47 : x
  2. Step 2: Convert to fraction form
    72,198.48/108,313.17 = 21,601.47/x
  3. Step 3: Cross multiply
    72,198.48x = 108,313.17 × 21,601.47
  4. Step 4: Simplify right side
    72,198.48x = 2,339,723,692.36
  5. Step 5: Solve for x
    x = 2,339,723,692.36/72,198.48
  6. Step 6: Final answer
    x = 32,406.83

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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.