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Finding the Fourth Proportional to 199,861.92, 275,782.91 and 128,338.83

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Solution

The fourth proportional to 199,861.92, 275,782.91 and 128,338.83 is: 177,090.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,861.92 : 275,782.91 = 128,338.83 : x
  2. Step 2: Convert to fraction form
    199,861.92/275,782.91 = 128,338.83/x
  3. Step 3: Cross multiply
    199,861.92x = 275,782.91 × 128,338.83
  4. Step 4: Simplify right side
    199,861.92x = 35,393,655,361.70
  5. Step 5: Solve for x
    x = 35,393,655,361.70/199,861.92
  6. Step 6: Final answer
    x = 177,090.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.