Home / 136.26-203.42-126.78

Finding the Fourth Proportional to 136.26, 203.42 and 126.78

Calculator

Solution

The fourth proportional to 136.26, 203.42 and 126.78 is: 189.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.26 : 203.42 = 126.78 : x
  2. Step 2: Convert to fraction form
    136.26/203.42 = 126.78/x
  3. Step 3: Cross multiply
    136.26x = 203.42 × 126.78
  4. Step 4: Simplify right side
    136.26x = 25,789.59
  5. Step 5: Solve for x
    x = 25,789.59/136.26
  6. Step 6: Final answer
    x = 189.27

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.