Finding the Fourth Proportional to 154.10, 212.49 and 122.99
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Solution
The fourth proportional to 154.10, 212.49 and 122.99 is: 169.58
Step by Step Solution
- Step 1: Write the proportion equation
154.10 : 212.49 = 122.99 : x - Step 2: Convert to fraction form
154.10/212.49 = 122.99/x - Step 3: Cross multiply
154.10x = 212.49 × 122.99 - Step 4: Simplify right side
154.10x = 26,133.08 - Step 5: Solve for x
x = 26,133.08/154.10 - Step 6: Final answer
x = 169.58
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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.