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Finding the Fourth Proportional to 72,149.94, 108,226.78 and 34,190.30

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Solution

The fourth proportional to 72,149.94, 108,226.78 and 34,190.30 is: 51,286.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,149.94 : 108,226.78 = 34,190.30 : x
  2. Step 2: Convert to fraction form
    72,149.94/108,226.78 = 34,190.30/x
  3. Step 3: Cross multiply
    72,149.94x = 108,226.78 × 34,190.30
  4. Step 4: Simplify right side
    72,149.94x = 3,700,306,453.65
  5. Step 5: Solve for x
    x = 3,700,306,453.65/72,149.94
  6. Step 6: Final answer
    x = 51,286.34

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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.