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Finding the Fourth Proportional to 192,811.80, 289,131.30 and 74,443.80

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Solution

The fourth proportional to 192,811.80, 289,131.30 and 74,443.80 is: 111,632.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,811.80 : 289,131.30 = 74,443.80 : x
  2. Step 2: Convert to fraction form
    192,811.80/289,131.30 = 74,443.80/x
  3. Step 3: Cross multiply
    192,811.80x = 289,131.30 × 74,443.80
  4. Step 4: Simplify right side
    192,811.80x = 21,524,032,670.94
  5. Step 5: Solve for x
    x = 21,524,032,670.94/192,811.80
  6. Step 6: Final answer
    x = 111,632.34

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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.