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Finding the Fourth Proportional to 80,486.00, 120,679.79 and 38,378.96

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Solution

The fourth proportional to 80,486.00, 120,679.79 and 38,378.96 is: 57,544.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,486.00 : 120,679.79 = 38,378.96 : x
  2. Step 2: Convert to fraction form
    80,486.00/120,679.79 = 38,378.96/x
  3. Step 3: Cross multiply
    80,486.00x = 120,679.79 × 38,378.96
  4. Step 4: Simplify right side
    80,486.00x = 4,631,564,037.92
  5. Step 5: Solve for x
    x = 4,631,564,037.92/80,486.00
  6. Step 6: Final answer
    x = 57,544.97

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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.