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Finding the Fourth Proportional to 192,725.87, 289,012.19 and 74,321.69

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Solution

The fourth proportional to 192,725.87, 289,012.19 and 74,321.69 is: 111,452.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,725.87 : 289,012.19 = 74,321.69 : x
  2. Step 2: Convert to fraction form
    192,725.87/289,012.19 = 74,321.69/x
  3. Step 3: Cross multiply
    192,725.87x = 289,012.19 × 74,321.69
  4. Step 4: Simplify right side
    192,725.87x = 21,479,872,574.73
  5. Step 5: Solve for x
    x = 21,479,872,574.73/192,725.87
  6. Step 6: Final answer
    x = 111,452.98

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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.