Finding the Fourth Proportional to 128,911.35, 193,293.21 and 121,481.02
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Solution
The fourth proportional to 128,911.35, 193,293.21 and 121,481.02 is: 182,151.97
Step by Step Solution
- Step 1: Write the proportion equation
128,911.35 : 193,293.21 = 121,481.02 : x - Step 2: Convert to fraction form
128,911.35/193,293.21 = 121,481.02/x - Step 3: Cross multiply
128,911.35x = 193,293.21 × 121,481.02 - Step 4: Simplify right side
128,911.35x = 23,481,455,578.10 - Step 5: Solve for x
x = 23,481,455,578.10/128,911.35 - Step 6: Final answer
x = 182,151.97
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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.