Finding the Fourth Proportional to 94.54, 141.68 and 78.70
Calculator
Solution
The fourth proportional to 94.54, 141.68 and 78.70 is: 117.94
Step by Step Solution
- Step 1: Write the proportion equation
94.54 : 141.68 = 78.70 : x - Step 2: Convert to fraction form
94.54/141.68 = 78.70/x - Step 3: Cross multiply
94.54x = 141.68 × 78.70 - Step 4: Simplify right side
94.54x = 11,150.22 - Step 5: Solve for x
x = 11,150.22/94.54 - Step 6: Final answer
x = 117.94
Related Problems
Find fourth proportional to 47.27, 70.84 and 39.35
Half scale
Find fourth proportional to 189.08, 283.36 and 157.40
Double scale
Find fourth proportional to 95.54, 143.18 and 79.70
Similar ratio
Find fourth proportional to 141.81, 212.52 and 118.05
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.