Finding the Fourth Proportional to 128,772.30, 193,158.45 and 121,514.70
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Solution
The fourth proportional to 128,772.30, 193,158.45 and 121,514.70 is: 182,272.05
Step by Step Solution
- Step 1: Write the proportion equation
128,772.30 : 193,158.45 = 121,514.70 : x - Step 2: Convert to fraction form
128,772.30/193,158.45 = 121,514.70/x - Step 3: Cross multiply
128,772.30x = 193,158.45 × 121,514.70 - Step 4: Simplify right side
128,772.30x = 23,471,591,104.22 - Step 5: Solve for x
x = 23,471,591,104.22/128,772.30 - Step 6: Final answer
x = 182,272.05
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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.