Finding the Fourth Proportional to 113.20, 169.80 and 84.68
Calculator
Solution
The fourth proportional to 113.20, 169.80 and 84.68 is: 127.02
Step by Step Solution
- Step 1: Write the proportion equation
113.20 : 169.80 = 84.68 : x - Step 2: Convert to fraction form
113.20/169.80 = 84.68/x - Step 3: Cross multiply
113.20x = 169.80 × 84.68 - Step 4: Simplify right side
113.20x = 14,378.13 - Step 5: Solve for x
x = 14,378.13/113.20 - Step 6: Final answer
x = 127.02
Related Problems
Find fourth proportional to 56.60, 84.90 and 42.34
Half scale
Find fourth proportional to 226.40, 339.59 and 169.36
Double scale
Find fourth proportional to 114.20, 171.30 and 85.68
Similar ratio
Find fourth proportional to 169.80, 254.69 and 127.02
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.