Home / 100,847.20-151,011.60-74,408.80

Finding the Fourth Proportional to 100,847.20, 151,011.60 and 74,408.80

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Solution

The fourth proportional to 100,847.20, 151,011.60 and 74,408.80 is: 111,421.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,847.20 : 151,011.60 = 74,408.80 : x
  2. Step 2: Convert to fraction form
    100,847.20/151,011.60 = 74,408.80/x
  3. Step 3: Cross multiply
    100,847.20x = 151,011.60 × 74,408.80
  4. Step 4: Simplify right side
    100,847.20x = 11,236,591,942.08
  5. Step 5: Solve for x
    x = 11,236,591,942.08/100,847.20
  6. Step 6: Final answer
    x = 111,421.95

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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.