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Finding the Fourth Proportional to 211,940.40, 317,910.60 and 93,550.80

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Solution

The fourth proportional to 211,940.40, 317,910.60 and 93,550.80 is: 140,326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,940.40 : 317,910.60 = 93,550.80 : x
  2. Step 2: Convert to fraction form
    211,940.40/317,910.60 = 93,550.80/x
  3. Step 3: Cross multiply
    211,940.40x = 317,910.60 × 93,550.80
  4. Step 4: Simplify right side
    211,940.40x = 29,740,790,958.48
  5. Step 5: Solve for x
    x = 29,740,790,958.48/211,940.40
  6. Step 6: Final answer
    x = 140,326.20

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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.