Home / 80,112.04-120,149.40-30,197.12

Finding the Fourth Proportional to 80,112.04, 120,149.40 and 30,197.12

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Solution

The fourth proportional to 80,112.04, 120,149.40 and 30,197.12 is: 45,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,112.04 : 120,149.40 = 30,197.12 : x
  2. Step 2: Convert to fraction form
    80,112.04/120,149.40 = 30,197.12/x
  3. Step 3: Cross multiply
    80,112.04x = 120,149.40 × 30,197.12
  4. Step 4: Simplify right side
    80,112.04x = 3,628,165,849.73
  5. Step 5: Solve for x
    x = 3,628,165,849.73/80,112.04
  6. Step 6: Final answer
    x = 45,288.65

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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.