Home / 139.03-191.87-80.82

Finding the Fourth Proportional to 139.03, 191.87 and 80.82

Calculator

Solution

The fourth proportional to 139.03, 191.87 and 80.82 is: 111.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.03 : 191.87 = 80.82 : x
  2. Step 2: Convert to fraction form
    139.03/191.87 = 80.82/x
  3. Step 3: Cross multiply
    139.03x = 191.87 × 80.82
  4. Step 4: Simplify right side
    139.03x = 15,506.93
  5. Step 5: Solve for x
    x = 15,506.93/139.03
  6. Step 6: Final answer
    x = 111.54

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.