Home / 195.72-270.09-108.39

Finding the Fourth Proportional to 195.72, 270.09 and 108.39

Calculator

Solution

The fourth proportional to 195.72, 270.09 and 108.39 is: 149.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.72 : 270.09 = 108.39 : x
  2. Step 2: Convert to fraction form
    195.72/270.09 = 108.39/x
  3. Step 3: Cross multiply
    195.72x = 270.09 × 108.39
  4. Step 4: Simplify right side
    195.72x = 29,275.06
  5. Step 5: Solve for x
    x = 29,275.06/195.72
  6. Step 6: Final answer
    x = 149.58

Related Problems

Find fourth proportional to 97.86, 135.05 and 54.20
Half scale
Find fourth proportional to 391.44, 540.18 and 216.78
Double scale
Find fourth proportional to 196.72, 271.47 and 109.39
Similar ratio
Find fourth proportional to 293.58, 405.14 and 162.59
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.