Finding the Fourth Proportional to 408,568.68, 612,853.14 and 128,107.80
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Solution
The fourth proportional to 408,568.68, 612,853.14 and 128,107.80 is: 192,161.74
Step by Step Solution
- Step 1: Write the proportion equation
408,568.68 : 612,853.14 = 128,107.80 : x - Step 2: Convert to fraction form
408,568.68/612,853.14 = 128,107.80/x - Step 3: Cross multiply
408,568.68x = 612,853.14 × 128,107.80 - Step 4: Simplify right side
408,568.68x = 78,511,267,488.49 - Step 5: Solve for x
x = 78,511,267,488.49/408,568.68 - Step 6: Final answer
x = 192,161.74
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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.