Finding the Fourth Proportional to 136,605.80, 204,908.70 and 128,295.20
Calculator
Solution
The fourth proportional to 136,605.80, 204,908.70 and 128,295.20 is: 192,442.80
Step by Step Solution
- Step 1: Write the proportion equation
136,605.80 : 204,908.70 = 128,295.20 : x - Step 2: Convert to fraction form
136,605.80/204,908.70 = 128,295.20/x - Step 3: Cross multiply
136,605.80x = 204,908.70 × 128,295.20 - Step 4: Simplify right side
136,605.80x = 26,288,802,648.24 - Step 5: Solve for x
x = 26,288,802,648.24/136,605.80 - Step 6: Final answer
x = 192,442.80
Related Problems
Find fourth proportional to 68,302.90, 102,454.35 and 64,147.60
Half scale
Find fourth proportional to 273,211.60, 409,817.40 and 256,590.40
Double scale
Find fourth proportional to 136,606.80, 204,910.20 and 128,296.20
Similar ratio
Find fourth proportional to 204,908.70, 307,363.05 and 192,442.80
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.