Home / 133-199.50-57

Finding the Fourth Proportional to 133, 199.50 and 57

Calculator

Solution

The fourth proportional to 133, 199.50 and 57 is: 85.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    133 : 199.50 = 57 : x
  2. Step 2: Convert to fraction form
    133/199.50 = 57/x
  3. Step 3: Cross multiply
    133x = 199.50 × 57
  4. Step 4: Simplify right side
    133x = 11,371.50
  5. Step 5: Solve for x
    x = 11,371.50/133
  6. Step 6: Final answer
    x = 85.50

Related Problems

Find fourth proportional to 66.50, 99.75 and 28.50
Half scale
Find fourth proportional to 266, 399 and 114
Double scale
Find fourth proportional to 134, 201 and 58
Similar ratio
Find fourth proportional to 199.50, 299.25 and 85.50
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.