Finding the Fourth Proportional to 209,369.80, 288,807.21 and 131,721.94
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Solution
The fourth proportional to 209,369.80, 288,807.21 and 131,721.94 is: 181,698.82
Step by Step Solution
- Step 1: Write the proportion equation
209,369.80 : 288,807.21 = 131,721.94 : x - Step 2: Convert to fraction form
209,369.80/288,807.21 = 131,721.94/x - Step 3: Cross multiply
209,369.80x = 288,807.21 × 131,721.94 - Step 4: Simplify right side
209,369.80x = 38,042,245,987.19 - Step 5: Solve for x
x = 38,042,245,987.19/209,369.80 - Step 6: Final answer
x = 181,698.82
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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.