Finding the Fourth Proportional to 131.30, 181.08 and 84.62
Calculator
Solution
The fourth proportional to 131.30, 181.08 and 84.62 is: 116.70
Step by Step Solution
- Step 1: Write the proportion equation
131.30 : 181.08 = 84.62 : x - Step 2: Convert to fraction form
131.30/181.08 = 84.62/x - Step 3: Cross multiply
131.30x = 181.08 × 84.62 - Step 4: Simplify right side
131.30x = 15,322.99 - Step 5: Solve for x
x = 15,322.99/131.30 - Step 6: Final answer
x = 116.70
Related Problems
Find fourth proportional to 65.65, 90.54 and 42.31
Half scale
Find fourth proportional to 262.60, 362.16 and 169.24
Double scale
Find fourth proportional to 132.30, 182.46 and 85.62
Similar ratio
Find fourth proportional to 196.95, 271.62 and 126.93
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.