Finding the Fourth Proportional to 87.99, 131.85 and 69.99
Calculator
Solution
The fourth proportional to 87.99, 131.85 and 69.99 is: 104.88
Step by Step Solution
- Step 1: Write the proportion equation
87.99 : 131.85 = 69.99 : x - Step 2: Convert to fraction form
87.99/131.85 = 69.99/x - Step 3: Cross multiply
87.99x = 131.85 × 69.99 - Step 4: Simplify right side
87.99x = 9,228.18 - Step 5: Solve for x
x = 9,228.18/87.99 - Step 6: Final answer
x = 104.88
Related Problems
Find fourth proportional to 44.00, 65.93 and 35.00
Half scale
Find fourth proportional to 175.98, 263.70 and 139.98
Double scale
Find fourth proportional to 88.99, 133.35 and 70.99
Similar ratio
Find fourth proportional to 131.99, 197.78 and 104.99
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.