Finding the Fourth Proportional to 142.49, 213.47 and 121.99
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Solution
The fourth proportional to 142.49, 213.47 and 121.99 is: 182.75
Step by Step Solution
- Step 1: Write the proportion equation
142.49 : 213.47 = 121.99 : x - Step 2: Convert to fraction form
142.49/213.47 = 121.99/x - Step 3: Cross multiply
142.49x = 213.47 × 121.99 - Step 4: Simplify right side
142.49x = 26,039.53 - Step 5: Solve for x
x = 26,039.53/142.49 - Step 6: Final answer
x = 182.75
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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.