Home / 129,163.20-193,399.20-82,161.60

Finding the Fourth Proportional to 129,163.20, 193,399.20 and 82,161.60

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Solution

The fourth proportional to 129,163.20, 193,399.20 and 82,161.60 is: 123,022.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,163.20 : 193,399.20 = 82,161.60 : x
  2. Step 2: Convert to fraction form
    129,163.20/193,399.20 = 82,161.60/x
  3. Step 3: Cross multiply
    129,163.20x = 193,399.20 × 82,161.60
  4. Step 4: Simplify right side
    129,163.20x = 15,889,987,710.72
  5. Step 5: Solve for x
    x = 15,889,987,710.72/129,163.20
  6. Step 6: Final answer
    x = 123,022.56

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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.