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Finding the Fourth Proportional to 191,485, 287,227.50 and 86,180.92

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Solution

The fourth proportional to 191,485, 287,227.50 and 86,180.92 is: 129,271.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,485 : 287,227.50 = 86,180.92 : x
  2. Step 2: Convert to fraction form
    191,485/287,227.50 = 86,180.92/x
  3. Step 3: Cross multiply
    191,485x = 287,227.50 × 86,180.92
  4. Step 4: Simplify right side
    191,485x = 24,753,530,199.30
  5. Step 5: Solve for x
    x = 24,753,530,199.30/191,485
  6. Step 6: Final answer
    x = 129,271.38

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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.