Finding the Fourth Proportional to 218,868.70, 328,060.05 and 85,704.70
Calculator
Solution
The fourth proportional to 218,868.70, 328,060.05 and 85,704.70 is: 128,461.90
Step by Step Solution
- Step 1: Write the proportion equation
218,868.70 : 328,060.05 = 85,704.70 : x - Step 2: Convert to fraction form
218,868.70/328,060.05 = 85,704.70/x - Step 3: Cross multiply
218,868.70x = 328,060.05 × 85,704.70 - Step 4: Simplify right side
218,868.70x = 28,116,288,167.24 - Step 5: Solve for x
x = 28,116,288,167.24/218,868.70 - Step 6: Final answer
x = 128,461.90
Related Problems
Find fourth proportional to 109,434.35, 164,030.03 and 42,852.35
Half scale
Find fourth proportional to 437,737.40, 656,120.10 and 171,409.40
Double scale
Find fourth proportional to 218,869.70, 328,061.55 and 85,705.70
Similar ratio
Find fourth proportional to 328,303.05, 492,090.08 and 128,557.05
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.