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Finding the Fourth Proportional to 189,805.73, 261,919.44 and 109,220.25

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Solution

The fourth proportional to 189,805.73, 261,919.44 and 109,220.25 is: 150,716.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,805.73 : 261,919.44 = 109,220.25 : x
  2. Step 2: Convert to fraction form
    189,805.73/261,919.44 = 109,220.25/x
  3. Step 3: Cross multiply
    189,805.73x = 261,919.44 × 109,220.25
  4. Step 4: Simplify right side
    189,805.73x = 28,606,906,716.66
  5. Step 5: Solve for x
    x = 28,606,906,716.66/189,805.73
  6. Step 6: Final answer
    x = 150,716.77

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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.