Finding the Fourth Proportional to 209,137.12, 288,729.29 and 137,725.09
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Solution
The fourth proportional to 209,137.12, 288,729.29 and 137,725.09 is: 190,139.69
Step by Step Solution
- Step 1: Write the proportion equation
209,137.12 : 288,729.29 = 137,725.09 : x - Step 2: Convert to fraction form
209,137.12/288,729.29 = 137,725.09/x - Step 3: Cross multiply
209,137.12x = 288,729.29 × 137,725.09 - Step 4: Simplify right side
209,137.12x = 39,765,267,450.89 - Step 5: Solve for x
x = 39,765,267,450.89/209,137.12 - Step 6: Final answer
x = 190,139.69
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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.