Finding the Fourth Proportional to 93.40, 139.95 and 84.97
Calculator
Solution
The fourth proportional to 93.40, 139.95 and 84.97 is: 127.32
Step by Step Solution
- Step 1: Write the proportion equation
93.40 : 139.95 = 84.97 : x - Step 2: Convert to fraction form
93.40/139.95 = 84.97/x - Step 3: Cross multiply
93.40x = 139.95 × 84.97 - Step 4: Simplify right side
93.40x = 11,891.20 - Step 5: Solve for x
x = 11,891.20/93.40 - Step 6: Final answer
x = 127.32
Related Problems
Find fourth proportional to 46.70, 69.98 and 42.48
Half scale
Find fourth proportional to 186.80, 279.90 and 169.94
Double scale
Find fourth proportional to 94.40, 141.45 and 85.97
Similar ratio
Find fourth proportional to 140.10, 209.93 and 127.45
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.