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Finding the Fourth Proportional to 191,620.52, 287,553.76 and 128,511.88

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Solution

The fourth proportional to 191,620.52, 287,553.76 and 128,511.88 is: 192,850.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,620.52 : 287,553.76 = 128,511.88 : x
  2. Step 2: Convert to fraction form
    191,620.52/287,553.76 = 128,511.88/x
  3. Step 3: Cross multiply
    191,620.52x = 287,553.76 × 128,511.88
  4. Step 4: Simplify right side
    191,620.52x = 36,954,074,298.67
  5. Step 5: Solve for x
    x = 36,954,074,298.67/191,620.52
  6. Step 6: Final answer
    x = 192,850.30

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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.