Finding the Fourth Proportional to 126,463.89, 189,639.68 and 67,287.09
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Solution
The fourth proportional to 126,463.89, 189,639.68 and 67,287.09 is: 100,900.75
Step by Step Solution
- Step 1: Write the proportion equation
126,463.89 : 189,639.68 = 67,287.09 : x - Step 2: Convert to fraction form
126,463.89/189,639.68 = 67,287.09/x - Step 3: Cross multiply
126,463.89x = 189,639.68 × 67,287.09 - Step 4: Simplify right side
126,463.89x = 12,760,301,879.30 - Step 5: Solve for x
x = 12,760,301,879.30/126,463.89 - Step 6: Final answer
x = 100,900.75
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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.