Finding the Fourth Proportional to 81,321.09, 121,951.30 and 27,998.00
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Solution
The fourth proportional to 81,321.09, 121,951.30 and 27,998.00 is: 41,986.56
Step by Step Solution
- Step 1: Write the proportion equation
81,321.09 : 121,951.30 = 27,998.00 : x - Step 2: Convert to fraction form
81,321.09/121,951.30 = 27,998.00/x - Step 3: Cross multiply
81,321.09x = 121,951.30 × 27,998.00 - Step 4: Simplify right side
81,321.09x = 3,414,392,934.69 - Step 5: Solve for x
x = 3,414,392,934.69/81,321.09 - Step 6: Final answer
x = 41,986.56
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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.