Finding the Fourth Proportional to 217,286.20, 299,855.28 and 121,793.68
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Solution
The fourth proportional to 217,286.20, 299,855.28 and 121,793.68 is: 168,075.46
Step by Step Solution
- Step 1: Write the proportion equation
217,286.20 : 299,855.28 = 121,793.68 : x - Step 2: Convert to fraction form
217,286.20/299,855.28 = 121,793.68/x - Step 3: Cross multiply
217,286.20x = 299,855.28 × 121,793.68 - Step 4: Simplify right side
217,286.20x = 36,520,478,018.63 - Step 5: Solve for x
x = 36,520,478,018.63/217,286.20 - Step 6: Final answer
x = 168,075.46
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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.