Finding the Fourth Proportional to 127.42, 175.83 and 85.99
Calculator
Solution
The fourth proportional to 127.42, 175.83 and 85.99 is: 118.66
Step by Step Solution
- Step 1: Write the proportion equation
127.42 : 175.83 = 85.99 : x - Step 2: Convert to fraction form
127.42/175.83 = 85.99/x - Step 3: Cross multiply
127.42x = 175.83 × 85.99 - Step 4: Simplify right side
127.42x = 15,119.62 - Step 5: Solve for x
x = 15,119.62/127.42 - Step 6: Final answer
x = 118.66
Related Problems
Find fourth proportional to 63.71, 87.92 and 43.00
Half scale
Find fourth proportional to 254.84, 351.66 and 171.98
Double scale
Find fourth proportional to 128.42, 177.21 and 86.99
Similar ratio
Find fourth proportional to 191.13, 263.75 and 128.99
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.