Finding the Fourth Proportional to 81,242.44, 121,828.81 and 27,939.78
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Solution
The fourth proportional to 81,242.44, 121,828.81 and 27,939.78 is: 41,897.69
Step by Step Solution
- Step 1: Write the proportion equation
81,242.44 : 121,828.81 = 27,939.78 : x - Step 2: Convert to fraction form
81,242.44/121,828.81 = 27,939.78/x - Step 3: Cross multiply
81,242.44x = 121,828.81 × 27,939.78 - Step 4: Simplify right side
81,242.44x = 3,403,870,383.78 - Step 5: Solve for x
x = 3,403,870,383.78/81,242.44 - Step 6: Final answer
x = 41,897.69
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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.