Home / 180.70-271.12-89.39

Finding the Fourth Proportional to 180.70, 271.12 and 89.39

Calculator

Solution

The fourth proportional to 180.70, 271.12 and 89.39 is: 134.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.70 : 271.12 = 89.39 : x
  2. Step 2: Convert to fraction form
    180.70/271.12 = 89.39/x
  3. Step 3: Cross multiply
    180.70x = 271.12 × 89.39
  4. Step 4: Simplify right side
    180.70x = 24,234.97
  5. Step 5: Solve for x
    x = 24,234.97/180.70
  6. Step 6: Final answer
    x = 134.12

Related Problems

Find fourth proportional to 90.35, 135.56 and 44.70
Half scale
Find fourth proportional to 361.39, 542.23 and 178.78
Double scale
Find fourth proportional to 181.70, 272.62 and 90.39
Similar ratio
Find fourth proportional to 271.04, 406.67 and 134.09
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.