Home / 92.80-140-92.80

Finding the Fourth Proportional to 92.80, 140 and 92.80

Calculator

Solution

The fourth proportional to 92.80, 140 and 92.80 is: 140

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.80 : 140 = 92.80 : x
  2. Step 2: Convert to fraction form
    92.80/140 = 92.80/x
  3. Step 3: Cross multiply
    92.80x = 140 × 92.80
  4. Step 4: Simplify right side
    92.80x = 12,992
  5. Step 5: Solve for x
    x = 12,992/92.80
  6. Step 6: Final answer
    x = 140

Related Problems

Find fourth proportional to 46.40, 70 and 46.40
Half scale
Find fourth proportional to 185.60, 280 and 185.60
Double scale
Find fourth proportional to 93.80, 141.51 and 93.80
Similar ratio
Find fourth proportional to 139.20, 210 and 139.20
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.