Finding the Fourth Proportional to 138,021.62, 206,827.24 and 71,372.80
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Solution
The fourth proportional to 138,021.62, 206,827.24 and 71,372.80 is: 106,953.09
Step by Step Solution
- Step 1: Write the proportion equation
138,021.62 : 206,827.24 = 71,372.80 : x - Step 2: Convert to fraction form
138,021.62/206,827.24 = 71,372.80/x - Step 3: Cross multiply
138,021.62x = 206,827.24 × 71,372.80 - Step 4: Simplify right side
138,021.62x = 14,761,839,235.07 - Step 5: Solve for x
x = 14,761,839,235.07/138,021.62 - Step 6: Final answer
x = 106,953.09
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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.