Finding the Fourth Proportional to 138,877.24, 207,906.26 and 86,116.92
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Solution
The fourth proportional to 138,877.24, 207,906.26 and 86,116.92 is: 128,921.39
Step by Step Solution
- Step 1: Write the proportion equation
138,877.24 : 207,906.26 = 86,116.92 : x - Step 2: Convert to fraction form
138,877.24/207,906.26 = 86,116.92/x - Step 3: Cross multiply
138,877.24x = 207,906.26 × 86,116.92 - Step 4: Simplify right side
138,877.24x = 17,904,246,759.92 - Step 5: Solve for x
x = 17,904,246,759.92/138,877.24 - Step 6: Final answer
x = 128,921.39
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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.