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Finding the Fourth Proportional to 192,519.20, 288,778.80 and 81,696.80

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Solution

The fourth proportional to 192,519.20, 288,778.80 and 81,696.80 is: 122,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,519.20 : 288,778.80 = 81,696.80 : x
  2. Step 2: Convert to fraction form
    192,519.20/288,778.80 = 81,696.80/x
  3. Step 3: Cross multiply
    192,519.20x = 288,778.80 × 81,696.80
  4. Step 4: Simplify right side
    192,519.20x = 23,592,303,867.84
  5. Step 5: Solve for x
    x = 23,592,303,867.84/192,519.20
  6. Step 6: Final answer
    x = 122,545.20

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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.