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Finding the Fourth Proportional to 80,112.70, 120,132.60 and 35,716.60

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Solution

The fourth proportional to 80,112.70, 120,132.60 and 35,716.60 is: 53,558.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,112.70 : 120,132.60 = 35,716.60 : x
  2. Step 2: Convert to fraction form
    80,112.70/120,132.60 = 35,716.60/x
  3. Step 3: Cross multiply
    80,112.70x = 120,132.60 × 35,716.60
  4. Step 4: Simplify right side
    80,112.70x = 4,290,728,021.16
  5. Step 5: Solve for x
    x = 4,290,728,021.16/80,112.70
  6. Step 6: Final answer
    x = 53,558.65

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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.