Finding the Fourth Proportional to 122.23, 183.42 and 91.70
Calculator
Solution
The fourth proportional to 122.23, 183.42 and 91.70 is: 137.61
Step by Step Solution
- Step 1: Write the proportion equation
122.23 : 183.42 = 91.70 : x - Step 2: Convert to fraction form
122.23/183.42 = 91.70/x - Step 3: Cross multiply
122.23x = 183.42 × 91.70 - Step 4: Simplify right side
122.23x = 16,820.07 - Step 5: Solve for x
x = 16,820.07/122.23 - Step 6: Final answer
x = 137.61
Related Problems
Find fourth proportional to 61.11, 91.71 and 45.85
Half scale
Find fourth proportional to 244.46, 366.84 and 183.41
Double scale
Find fourth proportional to 123.23, 184.92 and 92.70
Similar ratio
Find fourth proportional to 183.34, 275.13 and 137.55
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.