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Finding the Fourth Proportional to 159,694.58, 220,391.76 and 91,724.67

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Solution

The fourth proportional to 159,694.58, 220,391.76 and 91,724.67 is: 126,587.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,694.58 : 220,391.76 = 91,724.67 : x
  2. Step 2: Convert to fraction form
    159,694.58/220,391.76 = 91,724.67/x
  3. Step 3: Cross multiply
    159,694.58x = 220,391.76 × 91,724.67
  4. Step 4: Simplify right side
    159,694.58x = 20,215,361,542.71
  5. Step 5: Solve for x
    x = 20,215,361,542.71/159,694.58
  6. Step 6: Final answer
    x = 126,587.65

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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.