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Finding the Fourth Proportional to 128,761.80, 193,361.40 and 95,519.40

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Solution

The fourth proportional to 128,761.80, 193,361.40 and 95,519.40 is: 143,441.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,761.80 : 193,361.40 = 95,519.40 : x
  2. Step 2: Convert to fraction form
    128,761.80/193,361.40 = 95,519.40/x
  3. Step 3: Cross multiply
    128,761.80x = 193,361.40 × 95,519.40
  4. Step 4: Simplify right side
    128,761.80x = 18,469,764,911.16
  5. Step 5: Solve for x
    x = 18,469,764,911.16/128,761.80
  6. Step 6: Final answer
    x = 143,441.34

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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.