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Finding the Fourth Proportional to 198,936.40, 298,404.60 and 80,611.60

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Solution

The fourth proportional to 198,936.40, 298,404.60 and 80,611.60 is: 120,917.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,936.40 : 298,404.60 = 80,611.60 : x
  2. Step 2: Convert to fraction form
    198,936.40/298,404.60 = 80,611.60/x
  3. Step 3: Cross multiply
    198,936.40x = 298,404.60 × 80,611.60
  4. Step 4: Simplify right side
    198,936.40x = 24,054,872,253.36
  5. Step 5: Solve for x
    x = 24,054,872,253.36/198,936.40
  6. Step 6: Final answer
    x = 120,917.40

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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.