Finding the Fourth Proportional to 87,989.10, 121,423.38 and 49,747.99
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Solution
The fourth proportional to 87,989.10, 121,423.38 and 49,747.99 is: 68,651.33
Step by Step Solution
- Step 1: Write the proportion equation
87,989.10 : 121,423.38 = 49,747.99 : x - Step 2: Convert to fraction form
87,989.10/121,423.38 = 49,747.99/x - Step 3: Cross multiply
87,989.10x = 121,423.38 × 49,747.99 - Step 4: Simplify right side
87,989.10x = 6,040,568,541.71 - Step 5: Solve for x
x = 6,040,568,541.71/87,989.10 - Step 6: Final answer
x = 68,651.33
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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.