Home / 80,185.24-120,278.36-21,020.39

Finding the Fourth Proportional to 80,185.24, 120,278.36 and 21,020.39

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Solution

The fourth proportional to 80,185.24, 120,278.36 and 21,020.39 is: 31,530.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,185.24 : 120,278.36 = 21,020.39 : x
  2. Step 2: Convert to fraction form
    80,185.24/120,278.36 = 21,020.39/x
  3. Step 3: Cross multiply
    80,185.24x = 120,278.36 × 21,020.39
  4. Step 4: Simplify right side
    80,185.24x = 2,528,297,486.92
  5. Step 5: Solve for x
    x = 2,528,297,486.92/80,185.24
  6. Step 6: Final answer
    x = 31,530.71

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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.