Finding the Fourth Proportional to 217,149.36, 299,678.41 and 121,686.81
Calculator
Solution
The fourth proportional to 217,149.36, 299,678.41 and 121,686.81 is: 167,934.69
Step by Step Solution
- Step 1: Write the proportion equation
217,149.36 : 299,678.41 = 121,686.81 : x - Step 2: Convert to fraction form
217,149.36/299,678.41 = 121,686.81/x - Step 3: Cross multiply
217,149.36x = 299,678.41 × 121,686.81 - Step 4: Simplify right side
217,149.36x = 36,466,909,738.77 - Step 5: Solve for x
x = 36,466,909,738.77/217,149.36 - Step 6: Final answer
x = 167,934.69
Related Problems
Find fourth proportional to 108,574.68, 149,839.21 and 60,843.41
Half scale
Find fourth proportional to 434,298.72, 599,356.82 and 243,373.62
Double scale
Find fourth proportional to 217,150.36, 299,679.79 and 121,687.81
Similar ratio
Find fourth proportional to 325,724.04, 449,517.62 and 182,530.22
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.