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Finding the Fourth Proportional to 408,566.56, 612,850.02 and 128,105.68

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Solution

The fourth proportional to 408,566.56, 612,850.02 and 128,105.68 is: 192,158.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,566.56 : 612,850.02 = 128,105.68 : x
  2. Step 2: Convert to fraction form
    408,566.56/612,850.02 = 128,105.68/x
  3. Step 3: Cross multiply
    408,566.56x = 612,850.02 × 128,105.68
  4. Step 4: Simplify right side
    408,566.56x = 78,509,568,550.11
  5. Step 5: Solve for x
    x = 78,509,568,550.11/408,566.56
  6. Step 6: Final answer
    x = 192,158.58

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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.