Finding the Fourth Proportional to 126.40, 174.44 and 84.98
Calculator
Solution
The fourth proportional to 126.40, 174.44 and 84.98 is: 117.28
Step by Step Solution
- Step 1: Write the proportion equation
126.40 : 174.44 = 84.98 : x - Step 2: Convert to fraction form
126.40/174.44 = 84.98/x - Step 3: Cross multiply
126.40x = 174.44 × 84.98 - Step 4: Simplify right side
126.40x = 14,823.91 - Step 5: Solve for x
x = 14,823.91/126.40 - Step 6: Final answer
x = 117.28
Related Problems
Find fourth proportional to 63.20, 87.22 and 42.49
Half scale
Find fourth proportional to 252.80, 348.88 and 169.96
Double scale
Find fourth proportional to 127.40, 175.82 and 85.98
Similar ratio
Find fourth proportional to 189.60, 261.66 and 127.47
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.