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Finding the Fourth Proportional to 189,212.54, 261,099.92 and 104,327.78

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Solution

The fourth proportional to 189,212.54, 261,099.92 and 104,327.78 is: 143,964.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,212.54 : 261,099.92 = 104,327.78 : x
  2. Step 2: Convert to fraction form
    189,212.54/261,099.92 = 104,327.78/x
  3. Step 3: Cross multiply
    189,212.54x = 261,099.92 × 104,327.78
  4. Step 4: Simplify right side
    189,212.54x = 27,239,975,011.78
  5. Step 5: Solve for x
    x = 27,239,975,011.78/189,212.54
  6. Step 6: Final answer
    x = 143,964.96

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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.