Finding the Fourth Proportional to 138,621.51, 207,954.69 and 54,335.97
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Solution
The fourth proportional to 138,621.51, 207,954.69 and 54,335.97 is: 81,512.75
Step by Step Solution
- Step 1: Write the proportion equation
138,621.51 : 207,954.69 = 54,335.97 : x - Step 2: Convert to fraction form
138,621.51/207,954.69 = 54,335.97/x - Step 3: Cross multiply
138,621.51x = 207,954.69 × 54,335.97 - Step 4: Simplify right side
138,621.51x = 11,299,419,797.20 - Step 5: Solve for x
x = 11,299,419,797.20/138,621.51 - Step 6: Final answer
x = 81,512.75
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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.