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Finding the Fourth Proportional to 189,366.70, 261,420.73 and 117,769.79

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Solution

The fourth proportional to 189,366.70, 261,420.73 and 117,769.79 is: 162,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,366.70 : 261,420.73 = 117,769.79 : x
  2. Step 2: Convert to fraction form
    189,366.70/261,420.73 = 117,769.79/x
  3. Step 3: Cross multiply
    189,366.70x = 261,420.73 × 117,769.79
  4. Step 4: Simplify right side
    189,366.70x = 30,787,464,473.75
  5. Step 5: Solve for x
    x = 30,787,464,473.75/189,366.70
  6. Step 6: Final answer
    x = 162,581.20

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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.