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Finding the Fourth Proportional to 159,908.91, 220,674.23 and 91,939.17

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Solution

The fourth proportional to 159,908.91, 220,674.23 and 91,939.17 is: 126,876.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,908.91 : 220,674.23 = 91,939.17 : x
  2. Step 2: Convert to fraction form
    159,908.91/220,674.23 = 91,939.17/x
  3. Step 3: Cross multiply
    159,908.91x = 220,674.23 × 91,939.17
  4. Step 4: Simplify right side
    159,908.91x = 20,288,605,086.89
  5. Step 5: Solve for x
    x = 20,288,605,086.89/159,908.91
  6. Step 6: Final answer
    x = 126,876.01

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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.