Finding the Fourth Proportional to 71,439.60, 107,163.86 and 18,849.14
Calculator
Solution
The fourth proportional to 71,439.60, 107,163.86 and 18,849.14 is: 28,274.88
Step by Step Solution
- Step 1: Write the proportion equation
71,439.60 : 107,163.86 = 18,849.14 : x - Step 2: Convert to fraction form
71,439.60/107,163.86 = 18,849.14/x - Step 3: Cross multiply
71,439.60x = 107,163.86 × 18,849.14 - Step 4: Simplify right side
71,439.60x = 2,019,945,970.02 - Step 5: Solve for x
x = 2,019,945,970.02/71,439.60 - Step 6: Final answer
x = 28,274.88
Related Problems
Find fourth proportional to 35,719.80, 53,581.93 and 9,424.57
Half scale
Find fourth proportional to 142,879.20, 214,327.71 and 37,698.27
Double scale
Find fourth proportional to 71,440.60, 107,165.36 and 18,850.14
Similar ratio
Find fourth proportional to 107,159.40, 160,745.78 and 28,273.70
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.