Finding the Fourth Proportional to 50.19, 69.20 and 42.00
Calculator
Solution
The fourth proportional to 50.19, 69.20 and 42.00 is: 57.90
Step by Step Solution
- Step 1: Write the proportion equation
50.19 : 69.20 = 42.00 : x - Step 2: Convert to fraction form
50.19/69.20 = 42.00/x - Step 3: Cross multiply
50.19x = 69.20 × 42.00 - Step 4: Simplify right side
50.19x = 2,905.84 - Step 5: Solve for x
x = 2,905.84/50.19 - Step 6: Final answer
x = 57.90
Related Problems
Find fourth proportional to 25.09, 34.60 and 21.00
Half scale
Find fourth proportional to 100.37, 138.39 and 83.99
Double scale
Find fourth proportional to 51.19, 70.57 and 43
Similar ratio
Find fourth proportional to 75.28, 103.79 and 62.99
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.