Home / 180-248.40-111

Finding the Fourth Proportional to 180, 248.40 and 111

Calculator

Solution

The fourth proportional to 180, 248.40 and 111 is: 153.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    180 : 248.40 = 111 : x
  2. Step 2: Convert to fraction form
    180/248.40 = 111/x
  3. Step 3: Cross multiply
    180x = 248.40 × 111
  4. Step 4: Simplify right side
    180x = 27,572.40
  5. Step 5: Solve for x
    x = 27,572.40/180
  6. Step 6: Final answer
    x = 153.18

Related Problems

Find fourth proportional to 90, 124.20 and 55.50
Half scale
Find fourth proportional to 360, 496.80 and 222
Double scale
Find fourth proportional to 181, 249.78 and 112
Similar ratio
Find fourth proportional to 270, 372.60 and 166.50
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.