Home / 195.72-270.20-143.21

Finding the Fourth Proportional to 195.72, 270.20 and 143.21

Calculator

Solution

The fourth proportional to 195.72, 270.20 and 143.21 is: 197.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.72 : 270.20 = 143.21 : x
  2. Step 2: Convert to fraction form
    195.72/270.20 = 143.21/x
  3. Step 3: Cross multiply
    195.72x = 270.20 × 143.21
  4. Step 4: Simplify right side
    195.72x = 38,693.27
  5. Step 5: Solve for x
    x = 38,693.27/195.72
  6. Step 6: Final answer
    x = 197.70

Related Problems

Find fourth proportional to 97.86, 135.10 and 71.60
Half scale
Find fourth proportional to 391.43, 540.39 and 286.41
Double scale
Find fourth proportional to 196.72, 271.58 and 144.21
Similar ratio
Find fourth proportional to 293.57, 405.29 and 214.81
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.