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Finding the Fourth Proportional to 80,640.99, 120,945.24 and 50,641.83

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Solution

The fourth proportional to 80,640.99, 120,945.24 and 50,641.83 is: 75,952.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,640.99 : 120,945.24 = 50,641.83 : x
  2. Step 2: Convert to fraction form
    80,640.99/120,945.24 = 50,641.83/x
  3. Step 3: Cross multiply
    80,640.99x = 120,945.24 × 50,641.83
  4. Step 4: Simplify right side
    80,640.99x = 6,124,888,283.39
  5. Step 5: Solve for x
    x = 6,124,888,283.39/80,640.99
  6. Step 6: Final answer
    x = 75,952.54

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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.