Finding the Fourth Proportional to 128,028.20, 192,042.30 and 88,629.80
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Solution
The fourth proportional to 128,028.20, 192,042.30 and 88,629.80 is: 132,944.70
Step by Step Solution
- Step 1: Write the proportion equation
128,028.20 : 192,042.30 = 88,629.80 : x - Step 2: Convert to fraction form
128,028.20/192,042.30 = 88,629.80/x - Step 3: Cross multiply
128,028.20x = 192,042.30 × 88,629.80 - Step 4: Simplify right side
128,028.20x = 17,020,670,640.54 - Step 5: Solve for x
x = 17,020,670,640.54/128,028.20 - Step 6: Final answer
x = 132,944.70
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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.