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Finding the Fourth Proportional to 191,855.89, 287,660.84 and 79,613.58

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Solution

The fourth proportional to 191,855.89, 287,660.84 and 79,613.58 is: 119,369.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,855.89 : 287,660.84 = 79,613.58 : x
  2. Step 2: Convert to fraction form
    191,855.89/287,660.84 = 79,613.58/x
  3. Step 3: Cross multiply
    191,855.89x = 287,660.84 × 79,613.58
  4. Step 4: Simplify right side
    191,855.89x = 22,901,709,978.87
  5. Step 5: Solve for x
    x = 22,901,709,978.87/191,855.89
  6. Step 6: Final answer
    x = 119,369.33

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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.