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Finding the Fourth Proportional to 127,896.80, 191,845.20 and 120,639.20

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Solution

The fourth proportional to 127,896.80, 191,845.20 and 120,639.20 is: 180,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,896.80 : 191,845.20 = 120,639.20 : x
  2. Step 2: Convert to fraction form
    127,896.80/191,845.20 = 120,639.20/x
  3. Step 3: Cross multiply
    127,896.80x = 191,845.20 × 120,639.20
  4. Step 4: Simplify right side
    127,896.80x = 23,144,051,451.84
  5. Step 5: Solve for x
    x = 23,144,051,451.84/127,896.80
  6. Step 6: Final answer
    x = 180,958.80

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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.