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Finding the Fourth Proportional to 80,197.20, 120,166.20 and 75,531.60

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Solution

The fourth proportional to 80,197.20, 120,166.20 and 75,531.60 is: 113,175.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,197.20 : 120,166.20 = 75,531.60 : x
  2. Step 2: Convert to fraction form
    80,197.20/120,166.20 = 75,531.60/x
  3. Step 3: Cross multiply
    80,197.20x = 120,166.20 × 75,531.60
  4. Step 4: Simplify right side
    80,197.20x = 9,076,345,351.92
  5. Step 5: Solve for x
    x = 9,076,345,351.92/80,197.20
  6. Step 6: Final answer
    x = 113,175.34

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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.