Finding the Fourth Proportional to 111.09, 153.37 and 73.75
Calculator
Solution
The fourth proportional to 111.09, 153.37 and 73.75 is: 101.82
Step by Step Solution
- Step 1: Write the proportion equation
111.09 : 153.37 = 73.75 : x - Step 2: Convert to fraction form
111.09/153.37 = 73.75/x - Step 3: Cross multiply
111.09x = 153.37 × 73.75 - Step 4: Simplify right side
111.09x = 11,311.04 - Step 5: Solve for x
x = 11,311.04/111.09 - Step 6: Final answer
x = 101.82
Related Problems
Find fourth proportional to 55.55, 76.69 and 36.88
Half scale
Find fourth proportional to 222.18, 306.74 and 147.50
Double scale
Find fourth proportional to 112.09, 154.75 and 74.75
Similar ratio
Find fourth proportional to 166.64, 230.06 and 110.63
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.