Home / 80,099.21-120,148.82-30,190.50

Finding the Fourth Proportional to 80,099.21, 120,148.82 and 30,190.50

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Solution

The fourth proportional to 80,099.21, 120,148.82 and 30,190.50 is: 45,285.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,099.21 : 120,148.82 = 30,190.50 : x
  2. Step 2: Convert to fraction form
    80,099.21/120,148.82 = 30,190.50/x
  3. Step 3: Cross multiply
    80,099.21x = 120,148.82 × 30,190.50
  4. Step 4: Simplify right side
    80,099.21x = 3,627,352,799.26
  5. Step 5: Solve for x
    x = 3,627,352,799.26/80,099.21
  6. Step 6: Final answer
    x = 45,285.75

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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.