Finding the Fourth Proportional to 217,163.76, 299,715.57 and 121,690.68
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Solution
The fourth proportional to 217,163.76, 299,715.57 and 121,690.68 is: 167,949.71
Step by Step Solution
- Step 1: Write the proportion equation
217,163.76 : 299,715.57 = 121,690.68 : x - Step 2: Convert to fraction form
217,163.76/299,715.57 = 121,690.68/x - Step 3: Cross multiply
217,163.76x = 299,715.57 × 121,690.68 - Step 4: Simplify right side
217,163.76x = 36,472,591,519.89 - Step 5: Solve for x
x = 36,472,591,519.89/217,163.76 - Step 6: Final answer
x = 167,949.71
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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.