Home / 241.20-361.89-87.12

Finding the Fourth Proportional to 241.20, 361.89 and 87.12

Calculator

Solution

The fourth proportional to 241.20, 361.89 and 87.12 is: 130.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    241.20 : 361.89 = 87.12 : x
  2. Step 2: Convert to fraction form
    241.20/361.89 = 87.12/x
  3. Step 3: Cross multiply
    241.20x = 361.89 × 87.12
  4. Step 4: Simplify right side
    241.20x = 31,527.86
  5. Step 5: Solve for x
    x = 31,527.86/241.20
  6. Step 6: Final answer
    x = 130.71

Related Problems

Find fourth proportional to 120.60, 180.95 and 43.56
Half scale
Find fourth proportional to 482.40, 723.78 and 174.24
Double scale
Find fourth proportional to 242.20, 363.39 and 88.12
Similar ratio
Find fourth proportional to 361.80, 542.84 and 130.68
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.