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Finding the Fourth Proportional to 235,197.70, 352,694.49 and 85,388.20

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Solution

The fourth proportional to 235,197.70, 352,694.49 and 85,388.20 is: 128,045.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,197.70 : 352,694.49 = 85,388.20 : x
  2. Step 2: Convert to fraction form
    235,197.70/352,694.49 = 85,388.20/x
  3. Step 3: Cross multiply
    235,197.70x = 352,694.49 × 85,388.20
  4. Step 4: Simplify right side
    235,197.70x = 30,115,947,651.02
  5. Step 5: Solve for x
    x = 30,115,947,651.02/235,197.70
  6. Step 6: Final answer
    x = 128,045.25

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1.5x scale

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.