Finding the Fourth Proportional to 161,689.49, 221,515.66 and 155,629.05
Calculator
Solution
The fourth proportional to 161,689.49, 221,515.66 and 155,629.05 is: 213,212.82
Step by Step Solution
- Step 1: Write the proportion equation
161,689.49 : 221,515.66 = 155,629.05 : x - Step 2: Convert to fraction form
161,689.49/221,515.66 = 155,629.05/x - Step 3: Cross multiply
161,689.49x = 221,515.66 × 155,629.05 - Step 4: Simplify right side
161,689.49x = 34,474,271,725.92 - Step 5: Solve for x
x = 34,474,271,725.92/161,689.49 - Step 6: Final answer
x = 213,212.82
Related Problems
Find fourth proportional to 80,844.75, 110,757.83 and 77,814.53
Half scale
Find fourth proportional to 323,378.98, 443,031.32 and 311,258.10
Double scale
Find fourth proportional to 161,690.49, 221,517.03 and 155,630.05
Similar ratio
Find fourth proportional to 242,534.24, 332,273.49 and 233,443.58
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.