Finding the Fourth Proportional to 68.36, 102.36 and 64.68
Calculator
Solution
The fourth proportional to 68.36, 102.36 and 64.68 is: 96.85
Step by Step Solution
- Step 1: Write the proportion equation
68.36 : 102.36 = 64.68 : x - Step 2: Convert to fraction form
68.36/102.36 = 64.68/x - Step 3: Cross multiply
68.36x = 102.36 × 64.68 - Step 4: Simplify right side
68.36x = 6,620.64 - Step 5: Solve for x
x = 6,620.64/68.36 - Step 6: Final answer
x = 96.85
Related Problems
Find fourth proportional to 34.18, 51.18 and 32.34
Half scale
Find fourth proportional to 136.72, 204.72 and 129.36
Double scale
Find fourth proportional to 69.36, 103.86 and 65.68
Similar ratio
Find fourth proportional to 102.54, 153.54 and 97.02
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.