Finding the Fourth Proportional to 107,690.40, 161,708.40 and 72,784.80
Calculator
Solution
The fourth proportional to 107,690.40, 161,708.40 and 72,784.80 is: 109,293.99
Step by Step Solution
- Step 1: Write the proportion equation
107,690.40 : 161,708.40 = 72,784.80 : x - Step 2: Convert to fraction form
107,690.40/161,708.40 = 72,784.80/x - Step 3: Cross multiply
107,690.40x = 161,708.40 × 72,784.80 - Step 4: Simplify right side
107,690.40x = 11,769,913,552.32 - Step 5: Solve for x
x = 11,769,913,552.32/107,690.40 - Step 6: Final answer
x = 109,293.99
Related Problems
Find fourth proportional to 53,845.20, 80,854.20 and 36,392.40
Half scale
Find fourth proportional to 215,380.80, 323,416.80 and 145,569.60
Double scale
Find fourth proportional to 107,691.40, 161,709.90 and 72,785.80
Similar ratio
Find fourth proportional to 161,535.60, 242,562.60 and 109,177.20
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.