Finding the Fourth Proportional to 131,891.34, 197,396.37 and 78,409.74
Calculator
Solution
The fourth proportional to 131,891.34, 197,396.37 and 78,409.74 is: 117,352.65
Step by Step Solution
- Step 1: Write the proportion equation
131,891.34 : 197,396.37 = 78,409.74 : x - Step 2: Convert to fraction form
131,891.34/197,396.37 = 78,409.74/x - Step 3: Cross multiply
131,891.34x = 197,396.37 × 78,409.74 - Step 4: Simplify right side
131,891.34x = 15,477,798,048.64 - Step 5: Solve for x
x = 15,477,798,048.64/131,891.34 - Step 6: Final answer
x = 117,352.65
Related Problems
Find fourth proportional to 65,945.67, 98,698.19 and 39,204.87
Half scale
Find fourth proportional to 263,782.68, 394,792.74 and 156,819.48
Double scale
Find fourth proportional to 131,892.34, 197,397.87 and 78,410.74
Similar ratio
Find fourth proportional to 197,837.01, 296,094.56 and 117,614.61
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.