Finding the Fourth Proportional to 178.44, 267.69 and 87.18
Calculator
Solution
The fourth proportional to 178.44, 267.69 and 87.18 is: 130.78
Step by Step Solution
- Step 1: Write the proportion equation
178.44 : 267.69 = 87.18 : x - Step 2: Convert to fraction form
178.44/267.69 = 87.18/x - Step 3: Cross multiply
178.44x = 267.69 × 87.18 - Step 4: Simplify right side
178.44x = 23,337.21 - Step 5: Solve for x
x = 23,337.21/178.44 - Step 6: Final answer
x = 130.78
Related Problems
Find fourth proportional to 89.22, 133.85 and 43.59
Half scale
Find fourth proportional to 356.88, 535.38 and 174.36
Double scale
Find fourth proportional to 179.44, 269.19 and 88.18
Similar ratio
Find fourth proportional to 267.66, 401.54 and 130.77
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.