Finding the Fourth Proportional to 142.94, 214.12 and 84.99
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Solution
The fourth proportional to 142.94, 214.12 and 84.99 is: 127.32
Step by Step Solution
- Step 1: Write the proportion equation
142.94 : 214.12 = 84.99 : x - Step 2: Convert to fraction form
142.94/214.12 = 84.99/x - Step 3: Cross multiply
142.94x = 214.12 × 84.99 - Step 4: Simplify right side
142.94x = 18,198.97 - Step 5: Solve for x
x = 18,198.97/142.94 - Step 6: Final answer
x = 127.32
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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.