Home / 174.78-241.32-128.16

Finding the Fourth Proportional to 174.78, 241.32 and 128.16

Calculator

Solution

The fourth proportional to 174.78, 241.32 and 128.16 is: 176.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.78 : 241.32 = 128.16 : x
  2. Step 2: Convert to fraction form
    174.78/241.32 = 128.16/x
  3. Step 3: Cross multiply
    174.78x = 241.32 × 128.16
  4. Step 4: Simplify right side
    174.78x = 30,927.57
  5. Step 5: Solve for x
    x = 30,927.57/174.78
  6. Step 6: Final answer
    x = 176.95

Related Problems

Find fourth proportional to 87.39, 120.66 and 64.08
Half scale
Find fourth proportional to 349.56, 482.64 and 256.32
Double scale
Find fourth proportional to 175.78, 242.70 and 129.16
Similar ratio
Find fourth proportional to 262.17, 361.98 and 192.24
1.5x scale

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.