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Finding the Fourth Proportional to 119,672.11, 165,140.76 and 65,956.96

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Solution

The fourth proportional to 119,672.11, 165,140.76 and 65,956.96 is: 91,016.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,672.11 : 165,140.76 = 65,956.96 : x
  2. Step 2: Convert to fraction form
    119,672.11/165,140.76 = 65,956.96/x
  3. Step 3: Cross multiply
    119,672.11x = 165,140.76 × 65,956.96
  4. Step 4: Simplify right side
    119,672.11x = 10,892,182,501.69
  5. Step 5: Solve for x
    x = 10,892,182,501.69/119,672.11
  6. Step 6: Final answer
    x = 91,016.88

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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.