Finding the Fourth Proportional to 65.19, 89.94 and 61.99
Calculator
Solution
The fourth proportional to 65.19, 89.94 and 61.99 is: 85.53
Step by Step Solution
- Step 1: Write the proportion equation
65.19 : 89.94 = 61.99 : x - Step 2: Convert to fraction form
65.19/89.94 = 61.99/x - Step 3: Cross multiply
65.19x = 89.94 × 61.99 - Step 4: Simplify right side
65.19x = 5,575.38 - Step 5: Solve for x
x = 5,575.38/65.19 - Step 6: Final answer
x = 85.53
Related Problems
Find fourth proportional to 32.60, 44.97 and 31.00
Half scale
Find fourth proportional to 130.38, 179.88 and 123.98
Double scale
Find fourth proportional to 66.19, 91.32 and 62.99
Similar ratio
Find fourth proportional to 97.79, 134.91 and 92.99
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.