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Finding the Fourth Proportional to 80,704.80, 120,999.60 and 36,295.20

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Solution

The fourth proportional to 80,704.80, 120,999.60 and 36,295.20 is: 54,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,704.80 : 120,999.60 = 36,295.20 : x
  2. Step 2: Convert to fraction form
    80,704.80/120,999.60 = 36,295.20/x
  3. Step 3: Cross multiply
    80,704.80x = 120,999.60 × 36,295.20
  4. Step 4: Simplify right side
    80,704.80x = 4,391,704,681.92
  5. Step 5: Solve for x
    x = 4,391,704,681.92/80,704.80
  6. Step 6: Final answer
    x = 54,416.90

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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.