Finding the Fourth Proportional to 154.11, 212.57 and 122.99
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Solution
The fourth proportional to 154.11, 212.57 and 122.99 is: 169.63
Step by Step Solution
- Step 1: Write the proportion equation
154.11 : 212.57 = 122.99 : x - Step 2: Convert to fraction form
154.11/212.57 = 122.99/x - Step 3: Cross multiply
154.11x = 212.57 × 122.99 - Step 4: Simplify right side
154.11x = 26,142.31 - Step 5: Solve for x
x = 26,142.31/154.11 - Step 6: Final answer
x = 169.63
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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.