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Finding the Fourth Proportional to 198,999.20, 298,239.60 and 80,573.60

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Solution

The fourth proportional to 198,999.20, 298,239.60 and 80,573.60 is: 120,755.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,999.20 : 298,239.60 = 80,573.60 : x
  2. Step 2: Convert to fraction form
    198,999.20/298,239.60 = 80,573.60/x
  3. Step 3: Cross multiply
    198,999.20x = 298,239.60 × 80,573.60
  4. Step 4: Simplify right side
    198,999.20x = 24,030,238,234.56
  5. Step 5: Solve for x
    x = 24,030,238,234.56/198,999.20
  6. Step 6: Final answer
    x = 120,755.45

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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.