Finding the Fourth Proportional to 109.21, 150.71 and 60.09
Calculator
Solution
The fourth proportional to 109.21, 150.71 and 60.09 is: 82.92
Step by Step Solution
- Step 1: Write the proportion equation
109.21 : 150.71 = 60.09 : x - Step 2: Convert to fraction form
109.21/150.71 = 60.09/x - Step 3: Cross multiply
109.21x = 150.71 × 60.09 - Step 4: Simplify right side
109.21x = 9,056.16 - Step 5: Solve for x
x = 9,056.16/109.21 - Step 6: Final answer
x = 82.92
Related Problems
Find fourth proportional to 54.61, 75.36 and 30.05
Half scale
Find fourth proportional to 218.42, 301.42 and 120.18
Double scale
Find fourth proportional to 110.21, 152.09 and 61.09
Similar ratio
Find fourth proportional to 163.82, 226.07 and 90.14
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.