Finding the Fourth Proportional to 208,039.05, 312,067.49 and 81,706.68
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Solution
The fourth proportional to 208,039.05, 312,067.49 and 81,706.68 is: 122,563.52
Step by Step Solution
- Step 1: Write the proportion equation
208,039.05 : 312,067.49 = 81,706.68 : x - Step 2: Convert to fraction form
208,039.05/312,067.49 = 81,706.68/x - Step 3: Cross multiply
208,039.05x = 312,067.49 × 81,706.68 - Step 4: Simplify right side
208,039.05x = 25,497,998,135.30 - Step 5: Solve for x
x = 25,497,998,135.30/208,039.05 - Step 6: Final answer
x = 122,563.52
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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.