Finding the Fourth Proportional to 125.19, 187.65 and 70.99
Calculator
Solution
The fourth proportional to 125.19, 187.65 and 70.99 is: 106.40
Step by Step Solution
- Step 1: Write the proportion equation
125.19 : 187.65 = 70.99 : x - Step 2: Convert to fraction form
125.19/187.65 = 70.99/x - Step 3: Cross multiply
125.19x = 187.65 × 70.99 - Step 4: Simplify right side
125.19x = 13,320.80 - Step 5: Solve for x
x = 13,320.80/125.19 - Step 6: Final answer
x = 106.40
Related Problems
Find fourth proportional to 62.60, 93.83 and 35.49
Half scale
Find fourth proportional to 250.38, 375.30 and 141.98
Double scale
Find fourth proportional to 126.19, 189.15 and 71.99
Similar ratio
Find fourth proportional to 187.79, 281.48 and 106.48
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.