Finding the Fourth Proportional to 118,812.80, 178,163.40 and 68,907.08
Calculator
Solution
The fourth proportional to 118,812.80, 178,163.40 and 68,907.08 is: 103,328.26
Step by Step Solution
- Step 1: Write the proportion equation
118,812.80 : 178,163.40 = 68,907.08 : x - Step 2: Convert to fraction form
118,812.80/178,163.40 = 68,907.08/x - Step 3: Cross multiply
118,812.80x = 178,163.40 × 68,907.08 - Step 4: Simplify right side
118,812.80x = 12,276,719,656.87 - Step 5: Solve for x
x = 12,276,719,656.87/118,812.80 - Step 6: Final answer
x = 103,328.26
Related Problems
Find fourth proportional to 59,406.40, 89,081.70 and 34,453.54
Half scale
Find fourth proportional to 237,625.60, 356,326.80 and 137,814.16
Double scale
Find fourth proportional to 118,813.80, 178,164.90 and 68,908.08
Similar ratio
Find fourth proportional to 178,219.20, 267,245.10 and 103,360.62
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.