Finding the Fourth Proportional to 87,803.19, 121,227.74 and 57,639.80
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Solution
The fourth proportional to 87,803.19, 121,227.74 and 57,639.80 is: 79,581.88
Step by Step Solution
- Step 1: Write the proportion equation
87,803.19 : 121,227.74 = 57,639.80 : x - Step 2: Convert to fraction form
87,803.19/121,227.74 = 57,639.80/x - Step 3: Cross multiply
87,803.19x = 121,227.74 × 57,639.80 - Step 4: Simplify right side
87,803.19x = 6,987,542,919.07 - Step 5: Solve for x
x = 6,987,542,919.07/87,803.19 - Step 6: Final answer
x = 79,581.88
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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.