Finding the Fourth Proportional to 209,157.76, 313,785.84 and 68,916.38
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Solution
The fourth proportional to 209,157.76, 313,785.84 and 68,916.38 is: 103,390.78
Step by Step Solution
- Step 1: Write the proportion equation
209,157.76 : 313,785.84 = 68,916.38 : x - Step 2: Convert to fraction form
209,157.76/313,785.84 = 68,916.38/x - Step 3: Cross multiply
209,157.76x = 313,785.84 × 68,916.38 - Step 4: Simplify right side
209,157.76x = 21,624,984,188.06 - Step 5: Solve for x
x = 21,624,984,188.06/209,157.76 - Step 6: Final answer
x = 103,390.78
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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.