Finding the Fourth Proportional to 206,855.70, 310,283.55 and 128,123.70
Calculator
Solution
The fourth proportional to 206,855.70, 310,283.55 and 128,123.70 is: 192,185.55
Step by Step Solution
- Step 1: Write the proportion equation
206,855.70 : 310,283.55 = 128,123.70 : x - Step 2: Convert to fraction form
206,855.70/310,283.55 = 128,123.70/x - Step 3: Cross multiply
206,855.70x = 310,283.55 × 128,123.70 - Step 4: Simplify right side
206,855.70x = 39,754,676,475.14 - Step 5: Solve for x
x = 39,754,676,475.14/206,855.70 - Step 6: Final answer
x = 192,185.55
Related Problems
Find fourth proportional to 103,427.85, 155,141.78 and 64,061.85
Half scale
Find fourth proportional to 413,711.40, 620,567.10 and 256,247.40
Double scale
Find fourth proportional to 206,856.70, 310,285.05 and 128,124.70
Similar ratio
Find fourth proportional to 310,283.55, 465,425.33 and 192,185.55
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.