Finding the Fourth Proportional to 81,620.11, 122,372.75 and 31,658.09
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Solution
The fourth proportional to 81,620.11, 122,372.75 and 31,658.09 is: 47,464.87
Step by Step Solution
- Step 1: Write the proportion equation
81,620.11 : 122,372.75 = 31,658.09 : x - Step 2: Convert to fraction form
81,620.11/122,372.75 = 31,658.09/x - Step 3: Cross multiply
81,620.11x = 122,372.75 × 31,658.09 - Step 4: Simplify right side
81,620.11x = 3,874,088,032.85 - Step 5: Solve for x
x = 3,874,088,032.85/81,620.11 - Step 6: Final answer
x = 47,464.87
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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.