Finding the Fourth Proportional to 81,639.75, 112,715.99 and 49,827.09
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Solution
The fourth proportional to 81,639.75, 112,715.99 and 49,827.09 is: 68,793.81
Step by Step Solution
- Step 1: Write the proportion equation
81,639.75 : 112,715.99 = 49,827.09 : x - Step 2: Convert to fraction form
81,639.75/112,715.99 = 49,827.09/x - Step 3: Cross multiply
81,639.75x = 112,715.99 × 49,827.09 - Step 4: Simplify right side
81,639.75x = 5,616,309,529.03 - Step 5: Solve for x
x = 5,616,309,529.03/81,639.75 - Step 6: Final answer
x = 68,793.81
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1.5x scale
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.