Finding the Fourth Proportional to 118.70, 163.44 and 98.99
Calculator
Solution
The fourth proportional to 118.70, 163.44 and 98.99 is: 136.30
Step by Step Solution
- Step 1: Write the proportion equation
118.70 : 163.44 = 98.99 : x - Step 2: Convert to fraction form
118.70/163.44 = 98.99/x - Step 3: Cross multiply
118.70x = 163.44 × 98.99 - Step 4: Simplify right side
118.70x = 16,178.11 - Step 5: Solve for x
x = 16,178.11/118.70 - Step 6: Final answer
x = 136.30
Related Problems
Find fourth proportional to 59.35, 81.72 and 49.49
Half scale
Find fourth proportional to 237.39, 326.88 and 197.97
Double scale
Find fourth proportional to 119.70, 164.82 and 99.99
Similar ratio
Find fourth proportional to 178.04, 245.16 and 148.48
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.