Finding the Fourth Proportional to 144.36, 216.32 and 90.09
Calculator
Solution
The fourth proportional to 144.36, 216.32 and 90.09 is: 134.99
Step by Step Solution
- Step 1: Write the proportion equation
144.36 : 216.32 = 90.09 : x - Step 2: Convert to fraction form
144.36/216.32 = 90.09/x - Step 3: Cross multiply
144.36x = 216.32 × 90.09 - Step 4: Simplify right side
144.36x = 19,487.82 - Step 5: Solve for x
x = 19,487.82/144.36 - Step 6: Final answer
x = 134.99
Related Problems
Find fourth proportional to 72.18, 108.16 and 45.05
Half scale
Find fourth proportional to 288.72, 432.63 and 180.18
Double scale
Find fourth proportional to 145.36, 217.81 and 91.09
Similar ratio
Find fourth proportional to 216.54, 324.47 and 135.14
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.