Finding the Fourth Proportional to 122,121.24, 168,585.04 and 81,861.32
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Solution
The fourth proportional to 122,121.24, 168,585.04 and 81,861.32 is: 113,007.32
Step by Step Solution
- Step 1: Write the proportion equation
122,121.24 : 168,585.04 = 81,861.32 : x - Step 2: Convert to fraction form
122,121.24/168,585.04 = 81,861.32/x - Step 3: Cross multiply
122,121.24x = 168,585.04 × 81,861.32 - Step 4: Simplify right side
122,121.24x = 13,800,593,906.65 - Step 5: Solve for x
x = 13,800,593,906.65/122,121.24 - Step 6: Final answer
x = 113,007.32
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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.