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Finding the Fourth Proportional to 80,443.60, 120,672.60 and 33,686.80

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Solution

The fourth proportional to 80,443.60, 120,672.60 and 33,686.80 is: 50,533.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,443.60 : 120,672.60 = 33,686.80 : x
  2. Step 2: Convert to fraction form
    80,443.60/120,672.60 = 33,686.80/x
  3. Step 3: Cross multiply
    80,443.60x = 120,672.60 × 33,686.80
  4. Step 4: Simplify right side
    80,443.60x = 4,065,073,741.68
  5. Step 5: Solve for x
    x = 4,065,073,741.68/80,443.60
  6. Step 6: Final answer
    x = 50,533.22

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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.