Finding the Fourth Proportional to 163.19, 225.20 and 97.70
Calculator
Solution
The fourth proportional to 163.19, 225.20 and 97.70 is: 134.82
Step by Step Solution
- Step 1: Write the proportion equation
163.19 : 225.20 = 97.70 : x - Step 2: Convert to fraction form
163.19/225.20 = 97.70/x - Step 3: Cross multiply
163.19x = 225.20 × 97.70 - Step 4: Simplify right side
163.19x = 22,000.43 - Step 5: Solve for x
x = 22,000.43/163.19 - Step 6: Final answer
x = 134.82
Related Problems
Find fourth proportional to 81.59, 112.60 and 48.85
Half scale
Find fourth proportional to 326.37, 450.39 and 195.39
Double scale
Find fourth proportional to 164.19, 226.57 and 98.70
Similar ratio
Find fourth proportional to 244.78, 337.79 and 146.54
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.