Home / 201.09-301.35-85.38

Finding the Fourth Proportional to 201.09, 301.35 and 85.38

Calculator

Solution

The fourth proportional to 201.09, 301.35 and 85.38 is: 127.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.09 : 301.35 = 85.38 : x
  2. Step 2: Convert to fraction form
    201.09/301.35 = 85.38/x
  3. Step 3: Cross multiply
    201.09x = 301.35 × 85.38
  4. Step 4: Simplify right side
    201.09x = 25,729.26
  5. Step 5: Solve for x
    x = 25,729.26/201.09
  6. Step 6: Final answer
    x = 127.95

Related Problems

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.