Finding the Fourth Proportional to 71,515.28, 107,311.80 and 29,991.44
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Solution
The fourth proportional to 71,515.28, 107,311.80 and 29,991.44 is: 45,003.47
Step by Step Solution
- Step 1: Write the proportion equation
71,515.28 : 107,311.80 = 29,991.44 : x - Step 2: Convert to fraction form
71,515.28/107,311.80 = 29,991.44/x - Step 3: Cross multiply
71,515.28x = 107,311.80 × 29,991.44 - Step 4: Simplify right side
71,515.28x = 3,218,435,410.99 - Step 5: Solve for x
x = 3,218,435,410.99/71,515.28 - Step 6: Final answer
x = 45,003.47
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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.