Finding the Fourth Proportional to 111.51, 153.78 and 109.99
Calculator
Solution
The fourth proportional to 111.51, 153.78 and 109.99 is: 151.68
Step by Step Solution
- Step 1: Write the proportion equation
111.51 : 153.78 = 109.99 : x - Step 2: Convert to fraction form
111.51/153.78 = 109.99/x - Step 3: Cross multiply
111.51x = 153.78 × 109.99 - Step 4: Simplify right side
111.51x = 16,914.26 - Step 5: Solve for x
x = 16,914.26/111.51 - Step 6: Final answer
x = 151.68
Related Problems
Find fourth proportional to 55.76, 76.89 and 55.00
Half scale
Find fourth proportional to 223.02, 307.56 and 219.98
Double scale
Find fourth proportional to 112.51, 155.16 and 110.99
Similar ratio
Find fourth proportional to 167.27, 230.67 and 164.99
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.