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Finding the Fourth Proportional to 120,626.60, 180,939.90 and 50,498.60

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Solution

The fourth proportional to 120,626.60, 180,939.90 and 50,498.60 is: 75,747.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,626.60 : 180,939.90 = 50,498.60 : x
  2. Step 2: Convert to fraction form
    120,626.60/180,939.90 = 50,498.60/x
  3. Step 3: Cross multiply
    120,626.60x = 180,939.90 × 50,498.60
  4. Step 4: Simplify right side
    120,626.60x = 9,137,211,634.14
  5. Step 5: Solve for x
    x = 9,137,211,634.14/120,626.60
  6. Step 6: Final answer
    x = 75,747.90

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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.