Finding the Third Proportional to 67 and 138
Calculator
Solution
The third proportional to 67 and 138 is: 284.24
Step by Step Solution
- Step 1: Write the proportion equation
67 : 138 = 138 : x - Step 2: Convert to fraction form
67/138 = 138/x - Step 3: Cross multiply
67x = 138 × 138 - Step 4: Simplify right side
67x = 19,044 - Step 5: Solve for x
x = 19,044/67 - Step 6: Final answer
x = 284.24
Related Problems
Find third proportional to 33.50 and 69
Half scale
Find third proportional to 134 and 276
Double scale
Find third proportional to 69 and 142
Similar ratio
Find third proportional to 100.50 and 207
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.