Finding the Fourth Proportional to 97.56, 145.98 and 86.76
Calculator
Solution
The fourth proportional to 97.56, 145.98 and 86.76 is: 129.82
Step by Step Solution
- Step 1: Write the proportion equation
97.56 : 145.98 = 86.76 : x - Step 2: Convert to fraction form
97.56/145.98 = 86.76/x - Step 3: Cross multiply
97.56x = 145.98 × 86.76 - Step 4: Simplify right side
97.56x = 12,665.22 - Step 5: Solve for x
x = 12,665.22/97.56 - Step 6: Final answer
x = 129.82
Related Problems
Find fourth proportional to 48.78, 72.99 and 43.38
Half scale
Find fourth proportional to 195.12, 291.96 and 173.52
Double scale
Find fourth proportional to 98.56, 147.48 and 87.76
Similar ratio
Find fourth proportional to 146.34, 218.97 and 130.14
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.