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Finding the Fourth Proportional to 80,427.80, 120,738.90 and 79,844.60

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Solution

The fourth proportional to 80,427.80, 120,738.90 and 79,844.60 is: 119,863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,427.80 : 120,738.90 = 79,844.60 : x
  2. Step 2: Convert to fraction form
    80,427.80/120,738.90 = 79,844.60/x
  3. Step 3: Cross multiply
    80,427.80x = 120,738.90 × 79,844.60
  4. Step 4: Simplify right side
    80,427.80x = 9,640,349,174.94
  5. Step 5: Solve for x
    x = 9,640,349,174.94/80,427.80
  6. Step 6: Final answer
    x = 119,863.40

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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.