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Finding the Fourth Proportional to 55,861.92, 83,795.94 and 18,420.48

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Solution

The fourth proportional to 55,861.92, 83,795.94 and 18,420.48 is: 27,631.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,861.92 : 83,795.94 = 18,420.48 : x
  2. Step 2: Convert to fraction form
    55,861.92/83,795.94 = 18,420.48/x
  3. Step 3: Cross multiply
    55,861.92x = 83,795.94 × 18,420.48
  4. Step 4: Simplify right side
    55,861.92x = 1,543,561,436.85
  5. Step 5: Solve for x
    x = 1,543,561,436.85/55,861.92
  6. Step 6: Final answer
    x = 27,631.73

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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.