Finding the Fourth Proportional to 108.11, 149.19 and 58.99
Calculator
Solution
The fourth proportional to 108.11, 149.19 and 58.99 is: 81.40
Step by Step Solution
- Step 1: Write the proportion equation
108.11 : 149.19 = 58.99 : x - Step 2: Convert to fraction form
108.11/149.19 = 58.99/x - Step 3: Cross multiply
108.11x = 149.19 × 58.99 - Step 4: Simplify right side
108.11x = 8,800.57 - Step 5: Solve for x
x = 8,800.57/108.11 - Step 6: Final answer
x = 81.40
Related Problems
Find fourth proportional to 54.06, 74.60 and 29.49
Half scale
Find fourth proportional to 216.23, 298.39 and 117.98
Double scale
Find fourth proportional to 109.11, 150.57 and 59.99
Similar ratio
Find fourth proportional to 162.17, 223.79 and 88.48
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.