Finding the Fourth Proportional to 128,906.20, 193,877.70 and 115,427.80
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Solution
The fourth proportional to 128,906.20, 193,877.70 and 115,427.80 is: 173,605.90
Step by Step Solution
- Step 1: Write the proportion equation
128,906.20 : 193,877.70 = 115,427.80 : x - Step 2: Convert to fraction form
128,906.20/193,877.70 = 115,427.80/x - Step 3: Cross multiply
128,906.20x = 193,877.70 × 115,427.80 - Step 4: Simplify right side
128,906.20x = 22,378,876,380.06 - Step 5: Solve for x
x = 22,378,876,380.06/128,906.20 - Step 6: Final answer
x = 173,605.90
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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.