Finding the Fourth Proportional to 198,512.81, 273,836.79 and 121,978.74
Calculator
Solution
The fourth proportional to 198,512.81, 273,836.79 and 121,978.74 is: 168,262.53
Step by Step Solution
- Step 1: Write the proportion equation
198,512.81 : 273,836.79 = 121,978.74 : x - Step 2: Convert to fraction form
198,512.81/273,836.79 = 121,978.74/x - Step 3: Cross multiply
198,512.81x = 273,836.79 × 121,978.74 - Step 4: Simplify right side
198,512.81x = 33,402,266,609.84 - Step 5: Solve for x
x = 33,402,266,609.84/198,512.81 - Step 6: Final answer
x = 168,262.53
Related Problems
Find fourth proportional to 99,256.40, 136,918.40 and 60,989.37
Half scale
Find fourth proportional to 397,025.61, 547,673.58 and 243,957.48
Double scale
Find fourth proportional to 198,513.81, 273,838.17 and 121,979.74
Similar ratio
Find fourth proportional to 297,769.21, 410,755.19 and 182,968.11
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.