Finding the Fourth Proportional to 123.48, 185.22 and 54.99
Calculator
Solution
The fourth proportional to 123.48, 185.22 and 54.99 is: 82.49
Step by Step Solution
- Step 1: Write the proportion equation
123.48 : 185.22 = 54.99 : x - Step 2: Convert to fraction form
123.48/185.22 = 54.99/x - Step 3: Cross multiply
123.48x = 185.22 × 54.99 - Step 4: Simplify right side
123.48x = 10,185.25 - Step 5: Solve for x
x = 10,185.25/123.48 - Step 6: Final answer
x = 82.49
Related Problems
Find fourth proportional to 61.74, 92.61 and 27.50
Half scale
Find fourth proportional to 246.96, 370.44 and 109.98
Double scale
Find fourth proportional to 124.48, 186.72 and 55.99
Similar ratio
Find fourth proportional to 185.22, 277.83 and 82.49
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.