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Finding the Fourth Proportional to 203,919.20, 305,878.80 and 161,928.80

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Solution

The fourth proportional to 203,919.20, 305,878.80 and 161,928.80 is: 242,893.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,919.20 : 305,878.80 = 161,928.80 : x
  2. Step 2: Convert to fraction form
    203,919.20/305,878.80 = 161,928.80/x
  3. Step 3: Cross multiply
    203,919.20x = 305,878.80 × 161,928.80
  4. Step 4: Simplify right side
    203,919.20x = 49,530,587,029.44
  5. Step 5: Solve for x
    x = 49,530,587,029.44/203,919.20
  6. Step 6: Final answer
    x = 242,893.20

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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.