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Finding the Fourth Proportional to 192,765.40, 289,230.80 and 74,519.78

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Solution

The fourth proportional to 192,765.40, 289,230.80 and 74,519.78 is: 111,811.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,765.40 : 289,230.80 = 74,519.78 : x
  2. Step 2: Convert to fraction form
    192,765.40/289,230.80 = 74,519.78/x
  3. Step 3: Cross multiply
    192,765.40x = 289,230.80 × 74,519.78
  4. Step 4: Simplify right side
    192,765.40x = 21,553,413,766.47
  5. Step 5: Solve for x
    x = 21,553,413,766.47/192,765.40
  6. Step 6: Final answer
    x = 111,811.63

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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.