Finding the Fourth Proportional to 87,742.89, 131,639.84 and 31,581.99
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Solution
The fourth proportional to 87,742.89, 131,639.84 and 31,581.99 is: 47,382.17
Step by Step Solution
- Step 1: Write the proportion equation
87,742.89 : 131,639.84 = 31,581.99 : x - Step 2: Convert to fraction form
87,742.89/131,639.84 = 31,581.99/x - Step 3: Cross multiply
87,742.89x = 131,639.84 × 31,581.99 - Step 4: Simplify right side
87,742.89x = 4,157,448,110.48 - Step 5: Solve for x
x = 4,157,448,110.48/87,742.89 - Step 6: Final answer
x = 47,382.17
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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.