Finding the Fourth Proportional to 129,305.20, 193,842.60 and 76,658.80
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Solution
The fourth proportional to 129,305.20, 193,842.60 and 76,658.80 is: 114,919.90
Step by Step Solution
- Step 1: Write the proportion equation
129,305.20 : 193,842.60 = 76,658.80 : x - Step 2: Convert to fraction form
129,305.20/193,842.60 = 76,658.80/x - Step 3: Cross multiply
129,305.20x = 193,842.60 × 76,658.80 - Step 4: Simplify right side
129,305.20x = 14,859,741,104.88 - Step 5: Solve for x
x = 14,859,741,104.88/129,305.20 - Step 6: Final answer
x = 114,919.90
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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.