Finding the Fourth Proportional to 220,131.81, 303,783.21 and 129,491.46
Calculator
Solution
The fourth proportional to 220,131.81, 303,783.21 and 129,491.46 is: 178,698.99
Step by Step Solution
- Step 1: Write the proportion equation
220,131.81 : 303,783.21 = 129,491.46 : x - Step 2: Convert to fraction form
220,131.81/303,783.21 = 129,491.46/x - Step 3: Cross multiply
220,131.81x = 303,783.21 × 129,491.46 - Step 4: Simplify right side
220,131.81x = 39,337,331,386.39 - Step 5: Solve for x
x = 39,337,331,386.39/220,131.81 - Step 6: Final answer
x = 178,698.99
Related Problems
Find fourth proportional to 110,065.91, 151,891.61 and 64,745.73
Half scale
Find fourth proportional to 440,263.62, 607,566.42 and 258,982.92
Double scale
Find fourth proportional to 220,132.81, 303,784.59 and 129,492.46
Similar ratio
Find fourth proportional to 330,197.72, 455,674.82 and 194,237.19
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.