Finding the Fourth Proportional to 133.13, 199.44 and 81.79
Calculator
Solution
The fourth proportional to 133.13, 199.44 and 81.79 is: 122.53
Step by Step Solution
- Step 1: Write the proportion equation
133.13 : 199.44 = 81.79 : x - Step 2: Convert to fraction form
133.13/199.44 = 81.79/x - Step 3: Cross multiply
133.13x = 199.44 × 81.79 - Step 4: Simplify right side
133.13x = 16,312.20 - Step 5: Solve for x
x = 16,312.20/133.13 - Step 6: Final answer
x = 122.53
Related Problems
Find fourth proportional to 66.57, 99.72 and 40.90
Half scale
Find fourth proportional to 266.26, 398.88 and 163.58
Double scale
Find fourth proportional to 134.13, 200.94 and 82.79
Similar ratio
Find fourth proportional to 199.70, 299.16 and 122.69
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.