Finding the Fourth Proportional to 113.96, 170.74 and 79.65
Calculator
Solution
The fourth proportional to 113.96, 170.74 and 79.65 is: 119.34
Step by Step Solution
- Step 1: Write the proportion equation
113.96 : 170.74 = 79.65 : x - Step 2: Convert to fraction form
113.96/170.74 = 79.65/x - Step 3: Cross multiply
113.96x = 170.74 × 79.65 - Step 4: Simplify right side
113.96x = 13,599.44 - Step 5: Solve for x
x = 13,599.44/113.96 - Step 6: Final answer
x = 119.34
Related Problems
Find fourth proportional to 56.98, 85.37 and 39.83
Half scale
Find fourth proportional to 227.92, 341.48 and 159.30
Double scale
Find fourth proportional to 114.96, 172.24 and 80.65
Similar ratio
Find fourth proportional to 170.94, 256.11 and 119.48
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.