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Finding the Fourth Proportional to 53,861.99, 80,783.25 and 18,811.67

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Solution

The fourth proportional to 53,861.99, 80,783.25 and 18,811.67 is: 28,214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,861.99 : 80,783.25 = 18,811.67 : x
  2. Step 2: Convert to fraction form
    53,861.99/80,783.25 = 18,811.67/x
  3. Step 3: Cross multiply
    53,861.99x = 80,783.25 × 18,811.67
  4. Step 4: Simplify right side
    53,861.99x = 1,519,667,840.53
  5. Step 5: Solve for x
    x = 1,519,667,840.53/53,861.99
  6. Step 6: Final answer
    x = 28,214.10

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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.