Finding the Fourth Proportional to 78,731.56, 118,177.98 and 61,391.08
Calculator
Solution
The fourth proportional to 78,731.56, 118,177.98 and 61,391.08 is: 92,149.50
Step by Step Solution
- Step 1: Write the proportion equation
78,731.56 : 118,177.98 = 61,391.08 : x - Step 2: Convert to fraction form
78,731.56/118,177.98 = 61,391.08/x - Step 3: Cross multiply
78,731.56x = 118,177.98 × 61,391.08 - Step 4: Simplify right side
78,731.56x = 7,255,073,824.42 - Step 5: Solve for x
x = 7,255,073,824.42/78,731.56 - Step 6: Final answer
x = 92,149.50
Related Problems
Find fourth proportional to 39,365.78, 59,088.99 and 30,695.54
Half scale
Find fourth proportional to 157,463.12, 236,355.96 and 122,782.16
Double scale
Find fourth proportional to 78,732.56, 118,179.48 and 61,392.08
Similar ratio
Find fourth proportional to 118,097.34, 177,266.97 and 92,086.62
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.