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Finding the Fourth Proportional to 262,782.11, 394,107.54 and 85,339.91

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Solution

The fourth proportional to 262,782.11, 394,107.54 and 85,339.91 is: 127,988.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,782.11 : 394,107.54 = 85,339.91 : x
  2. Step 2: Convert to fraction form
    262,782.11/394,107.54 = 85,339.91/x
  3. Step 3: Cross multiply
    262,782.11x = 394,107.54 × 85,339.91
  4. Step 4: Simplify right side
    262,782.11x = 33,633,101,993.92
  5. Step 5: Solve for x
    x = 33,633,101,993.92/262,782.11
  6. Step 6: Final answer
    x = 127,988.55

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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.