Finding the Fourth Proportional to 87,825.09, 121,268.49 and 81,108.26
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Solution
The fourth proportional to 87,825.09, 121,268.49 and 81,108.26 is: 111,993.92
Step by Step Solution
- Step 1: Write the proportion equation
87,825.09 : 121,268.49 = 81,108.26 : x - Step 2: Convert to fraction form
87,825.09/121,268.49 = 81,108.26/x - Step 3: Cross multiply
87,825.09x = 121,268.49 × 81,108.26 - Step 4: Simplify right side
87,825.09x = 9,835,876,216.73 - Step 5: Solve for x
x = 9,835,876,216.73/87,825.09 - Step 6: Final answer
x = 111,993.92
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.