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Finding the Fourth Proportional to 191,930.01, 287,771.81 and 79,687.70

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Solution

The fourth proportional to 191,930.01, 287,771.81 and 79,687.70 is: 119,480.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,930.01 : 287,771.81 = 79,687.70 : x
  2. Step 2: Convert to fraction form
    191,930.01/287,771.81 = 79,687.70/x
  3. Step 3: Cross multiply
    191,930.01x = 287,771.81 × 79,687.70
  4. Step 4: Simplify right side
    191,930.01x = 22,931,871,826.44
  5. Step 5: Solve for x
    x = 22,931,871,826.44/191,930.01
  6. Step 6: Final answer
    x = 119,480.39

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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.