Finding the Fourth Proportional to 137,539.36, 189,804.80 and 86,585.81
Calculator
Solution
The fourth proportional to 137,539.36, 189,804.80 and 86,585.81 is: 119,488.72
Step by Step Solution
- Step 1: Write the proportion equation
137,539.36 : 189,804.80 = 86,585.81 : x - Step 2: Convert to fraction form
137,539.36/189,804.80 = 86,585.81/x - Step 3: Cross multiply
137,539.36x = 189,804.80 × 86,585.81 - Step 4: Simplify right side
137,539.36x = 16,434,401,400.86 - Step 5: Solve for x
x = 16,434,401,400.86/137,539.36 - Step 6: Final answer
x = 119,488.72
Related Problems
Find fourth proportional to 68,769.68, 94,902.40 and 43,292.90
Half scale
Find fourth proportional to 275,078.72, 379,609.60 and 173,171.61
Double scale
Find fourth proportional to 137,540.36, 189,806.18 and 86,586.81
Similar ratio
Find fourth proportional to 206,309.04, 284,707.20 and 129,878.71
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.