Finding the Fourth Proportional to 97.80, 135 and 60.99
Calculator
Solution
The fourth proportional to 97.80, 135 and 60.99 is: 84.19
Step by Step Solution
- Step 1: Write the proportion equation
97.80 : 135 = 60.99 : x - Step 2: Convert to fraction form
97.80/135 = 60.99/x - Step 3: Cross multiply
97.80x = 135 × 60.99 - Step 4: Simplify right side
97.80x = 8,233.65 - Step 5: Solve for x
x = 8,233.65/97.80 - Step 6: Final answer
x = 84.19
Related Problems
Find fourth proportional to 48.90, 67.50 and 30.50
Half scale
Find fourth proportional to 195.60, 270 and 121.98
Double scale
Find fourth proportional to 98.80, 136.38 and 61.99
Similar ratio
Find fourth proportional to 146.70, 202.50 and 91.49
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.