Finding the Fourth Proportional to 138,640.26, 206,957.49 and 121,825.20
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Solution
The fourth proportional to 138,640.26, 206,957.49 and 121,825.20 is: 181,856.54
Step by Step Solution
- Step 1: Write the proportion equation
138,640.26 : 206,957.49 = 121,825.20 : x - Step 2: Convert to fraction form
138,640.26/206,957.49 = 121,825.20/x - Step 3: Cross multiply
138,640.26x = 206,957.49 × 121,825.20 - Step 4: Simplify right side
138,640.26x = 25,212,637,610.75 - Step 5: Solve for x
x = 25,212,637,610.75/138,640.26 - Step 6: Final answer
x = 181,856.54
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.