Finding the Fourth Proportional to 128,212.80, 192,319.20 and 126,463.20
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Solution
The fourth proportional to 128,212.80, 192,319.20 and 126,463.20 is: 189,694.80
Step by Step Solution
- Step 1: Write the proportion equation
128,212.80 : 192,319.20 = 126,463.20 : x - Step 2: Convert to fraction form
128,212.80/192,319.20 = 126,463.20/x - Step 3: Cross multiply
128,212.80x = 192,319.20 × 126,463.20 - Step 4: Simplify right side
128,212.80x = 24,321,301,453.44 - Step 5: Solve for x
x = 24,321,301,453.44/128,212.80 - Step 6: Final answer
x = 189,694.80
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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.