Finding the Fourth Proportional to 115.26, 158.94 and 98.88
Calculator
Solution
The fourth proportional to 115.26, 158.94 and 98.88 is: 136.35
Step by Step Solution
- Step 1: Write the proportion equation
115.26 : 158.94 = 98.88 : x - Step 2: Convert to fraction form
115.26/158.94 = 98.88/x - Step 3: Cross multiply
115.26x = 158.94 × 98.88 - Step 4: Simplify right side
115.26x = 15,715.99 - Step 5: Solve for x
x = 15,715.99/115.26 - Step 6: Final answer
x = 136.35
Related Problems
Find fourth proportional to 57.63, 79.47 and 49.44
Half scale
Find fourth proportional to 230.52, 317.88 and 197.76
Double scale
Find fourth proportional to 116.26, 160.32 and 99.88
Similar ratio
Find fourth proportional to 172.89, 238.41 and 148.32
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.