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Finding the Fourth Proportional to 80,505.81, 120,755.64 and 33,107.71

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Solution

The fourth proportional to 80,505.81, 120,755.64 and 33,107.71 is: 49,660.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,505.81 : 120,755.64 = 33,107.71 : x
  2. Step 2: Convert to fraction form
    80,505.81/120,755.64 = 33,107.71/x
  3. Step 3: Cross multiply
    80,505.81x = 120,755.64 × 33,107.71
  4. Step 4: Simplify right side
    80,505.81x = 3,997,942,709.98
  5. Step 5: Solve for x
    x = 3,997,942,709.98/80,505.81
  6. Step 6: Final answer
    x = 49,660.30

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1.5x scale

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.