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Finding the Fourth Proportional to 191,954.30, 287,808.08 and 79,711.97

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Solution

The fourth proportional to 191,954.30, 287,808.08 and 79,711.97 is: 119,516.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,954.30 : 287,808.08 = 79,711.97 : x
  2. Step 2: Convert to fraction form
    191,954.30/287,808.08 = 79,711.97/x
  3. Step 3: Cross multiply
    191,954.30x = 287,808.08 × 79,711.97
  4. Step 4: Simplify right side
    191,954.30x = 22,941,747,201.12
  5. Step 5: Solve for x
    x = 22,941,747,201.12/191,954.30
  6. Step 6: Final answer
    x = 119,516.72

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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.