Finding the Fourth Proportional to 87,639.36, 131,514.84 and 31,478.28
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Solution
The fourth proportional to 87,639.36, 131,514.84 and 31,478.28 is: 47,237.46
Step by Step Solution
- Step 1: Write the proportion equation
87,639.36 : 131,514.84 = 31,478.28 : x - Step 2: Convert to fraction form
87,639.36/131,514.84 = 31,478.28/x - Step 3: Cross multiply
87,639.36x = 131,514.84 × 31,478.28 - Step 4: Simplify right side
87,639.36x = 4,139,860,957.68 - Step 5: Solve for x
x = 4,139,860,957.68/87,639.36 - Step 6: Final answer
x = 47,237.46
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1.5x scale
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.