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Finding the Fourth Proportional to 80,598.80, 120,840.60 and 36,189.20

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Solution

The fourth proportional to 80,598.80, 120,840.60 and 36,189.20 is: 54,257.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,598.80 : 120,840.60 = 36,189.20 : x
  2. Step 2: Convert to fraction form
    80,598.80/120,840.60 = 36,189.20/x
  3. Step 3: Cross multiply
    80,598.80x = 120,840.60 × 36,189.20
  4. Step 4: Simplify right side
    80,598.80x = 4,373,124,641.52
  5. Step 5: Solve for x
    x = 4,373,124,641.52/80,598.80
  6. Step 6: Final answer
    x = 54,257.94

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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.