Finding the Fourth Proportional to 71,805.20, 107,707.80 and 40,701.20
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Solution
The fourth proportional to 71,805.20, 107,707.80 and 40,701.20 is: 61,051.80
Step by Step Solution
- Step 1: Write the proportion equation
71,805.20 : 107,707.80 = 40,701.20 : x - Step 2: Convert to fraction form
71,805.20/107,707.80 = 40,701.20/x - Step 3: Cross multiply
71,805.20x = 107,707.80 × 40,701.20 - Step 4: Simplify right side
71,805.20x = 4,383,836,709.36 - Step 5: Solve for x
x = 4,383,836,709.36/71,805.20 - Step 6: Final answer
x = 61,051.80
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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.