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Finding the Fourth Proportional to 191,956.11, 287,811.14 and 79,713.80

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Solution

The fourth proportional to 191,956.11, 287,811.14 and 79,713.80 is: 119,519.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,956.11 : 287,811.14 = 79,713.80 : x
  2. Step 2: Convert to fraction form
    191,956.11/287,811.14 = 79,713.80/x
  3. Step 3: Cross multiply
    191,956.11x = 287,811.14 × 79,713.80
  4. Step 4: Simplify right side
    191,956.11x = 22,942,519,253.16
  5. Step 5: Solve for x
    x = 22,942,519,253.16/191,956.11
  6. Step 6: Final answer
    x = 119,519.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.