Finding the Fourth Proportional to 128,542.40, 192,813.60 and 115,452.80
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Solution
The fourth proportional to 128,542.40, 192,813.60 and 115,452.80 is: 173,179.20
Step by Step Solution
- Step 1: Write the proportion equation
128,542.40 : 192,813.60 = 115,452.80 : x - Step 2: Convert to fraction form
128,542.40/192,813.60 = 115,452.80/x - Step 3: Cross multiply
128,542.40x = 192,813.60 × 115,452.80 - Step 4: Simplify right side
128,542.40x = 22,260,869,998.08 - Step 5: Solve for x
x = 22,260,869,998.08/128,542.40 - Step 6: Final answer
x = 173,179.20
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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.