Finding the Fourth Proportional to 209,278.12, 313,740.22 and 90,859.88
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Solution
The fourth proportional to 209,278.12, 313,740.22 and 90,859.88 is: 136,212.99
Step by Step Solution
- Step 1: Write the proportion equation
209,278.12 : 313,740.22 = 90,859.88 : x - Step 2: Convert to fraction form
209,278.12/313,740.22 = 90,859.88/x - Step 3: Cross multiply
209,278.12x = 313,740.22 × 90,859.88 - Step 4: Simplify right side
209,278.12x = 28,506,398,740.37 - Step 5: Solve for x
x = 28,506,398,740.37/209,278.12 - Step 6: Final answer
x = 136,212.99
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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.