Finding the Third Proportional to 53 and 139.50
Calculator
Solution
The third proportional to 53 and 139.50 is: 367.17
Step by Step Solution
- Step 1: Write the proportion equation
53 : 139.50 = 139.50 : x - Step 2: Convert to fraction form
53/139.50 = 139.50/x - Step 3: Cross multiply
53x = 139.50 × 139.50 - Step 4: Simplify right side
53x = 19,460.25 - Step 5: Solve for x
x = 19,460.25/53 - Step 6: Final answer
x = 367.17
Related Problems
Find third proportional to 26.50 and 69.75
Half scale
Find third proportional to 106 and 279
Double scale
Find third proportional to 55 and 145
Similar ratio
Find third proportional to 79.50 and 209.25
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.