Finding the Fourth Proportional to 143.46, 198.06 and 102.12
Calculator
Solution
The fourth proportional to 143.46, 198.06 and 102.12 is: 140.99
Step by Step Solution
- Step 1: Write the proportion equation
143.46 : 198.06 = 102.12 : x - Step 2: Convert to fraction form
143.46/198.06 = 102.12/x - Step 3: Cross multiply
143.46x = 198.06 × 102.12 - Step 4: Simplify right side
143.46x = 20,225.89 - Step 5: Solve for x
x = 20,225.89/143.46 - Step 6: Final answer
x = 140.99
Related Problems
Find fourth proportional to 71.73, 99.03 and 51.06
Half scale
Find fourth proportional to 286.92, 396.12 and 204.24
Double scale
Find fourth proportional to 144.46, 199.44 and 103.12
Similar ratio
Find fourth proportional to 215.19, 297.09 and 153.18
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.