Finding the Fourth Proportional to 98.55, 147.84 and 39.99
Calculator
Solution
The fourth proportional to 98.55, 147.84 and 39.99 is: 59.99
Step by Step Solution
- Step 1: Write the proportion equation
98.55 : 147.84 = 39.99 : x - Step 2: Convert to fraction form
98.55/147.84 = 39.99/x - Step 3: Cross multiply
98.55x = 147.84 × 39.99 - Step 4: Simplify right side
98.55x = 5,912.12 - Step 5: Solve for x
x = 5,912.12/98.55 - Step 6: Final answer
x = 59.99
Related Problems
Find fourth proportional to 49.28, 73.92 and 20.00
Half scale
Find fourth proportional to 197.10, 295.68 and 79.98
Double scale
Find fourth proportional to 99.55, 149.34 and 40.99
Similar ratio
Find fourth proportional to 147.83, 221.76 and 59.99
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.