Finding the Fourth Proportional to 100,685.48, 138,949.97 and 57,672.05
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Solution
The fourth proportional to 100,685.48, 138,949.97 and 57,672.05 is: 79,589.72
Step by Step Solution
- Step 1: Write the proportion equation
100,685.48 : 138,949.97 = 57,672.05 : x - Step 2: Convert to fraction form
100,685.48/138,949.97 = 57,672.05/x - Step 3: Cross multiply
100,685.48x = 138,949.97 × 57,672.05 - Step 4: Simplify right side
100,685.48x = 8,013,528,634.23 - Step 5: Solve for x
x = 8,013,528,634.23/100,685.48 - Step 6: Final answer
x = 79,589.72
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.