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Finding the Fourth Proportional to 192,811.20, 289,022.40 and 87,705.60

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Solution

The fourth proportional to 192,811.20, 289,022.40 and 87,705.60 is: 131,469.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,811.20 : 289,022.40 = 87,705.60 : x
  2. Step 2: Convert to fraction form
    192,811.20/289,022.40 = 87,705.60/x
  3. Step 3: Cross multiply
    192,811.20x = 289,022.40 × 87,705.60
  4. Step 4: Simplify right side
    192,811.20x = 25,348,883,005.44
  5. Step 5: Solve for x
    x = 25,348,883,005.44/192,811.20
  6. Step 6: Final answer
    x = 131,469.97

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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.