Home / 80,100.33-120,150.50-30,191.63

Finding the Fourth Proportional to 80,100.33, 120,150.50 and 30,191.63

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Solution

The fourth proportional to 80,100.33, 120,150.50 and 30,191.63 is: 45,287.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,100.33 : 120,150.50 = 30,191.63 : x
  2. Step 2: Convert to fraction form
    80,100.33/120,150.50 = 30,191.63/x
  3. Step 3: Cross multiply
    80,100.33x = 120,150.50 × 30,191.63
  4. Step 4: Simplify right side
    80,100.33x = 3,627,538,688.60
  5. Step 5: Solve for x
    x = 3,627,538,688.60/80,100.33
  6. Step 6: Final answer
    x = 45,287.44

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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.