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Finding the Fourth Proportional to 191,919.98, 287,871.78 and 65,571.56

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Solution

The fourth proportional to 191,919.98, 287,871.78 and 65,571.56 is: 98,354.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,919.98 : 287,871.78 = 65,571.56 : x
  2. Step 2: Convert to fraction form
    191,919.98/287,871.78 = 65,571.56/x
  3. Step 3: Cross multiply
    191,919.98x = 287,871.78 × 65,571.56
  4. Step 4: Simplify right side
    191,919.98x = 18,876,201,694.58
  5. Step 5: Solve for x
    x = 18,876,201,694.58/191,919.98
  6. Step 6: Final answer
    x = 98,354.54

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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.