Finding the Fourth Proportional to 81,809.09, 122,716.31 and 22,639.80
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Solution
The fourth proportional to 81,809.09, 122,716.31 and 22,639.80 is: 33,960.45
Step by Step Solution
- Step 1: Write the proportion equation
81,809.09 : 122,716.31 = 22,639.80 : x - Step 2: Convert to fraction form
81,809.09/122,716.31 = 22,639.80/x - Step 3: Cross multiply
81,809.09x = 122,716.31 × 22,639.80 - Step 4: Simplify right side
81,809.09x = 2,778,273,078.53 - Step 5: Solve for x
x = 2,778,273,078.53/81,809.09 - Step 6: Final answer
x = 33,960.45
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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.