Finding the Fourth Proportional to 142.91, 197.19 and 84.68
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Solution
The fourth proportional to 142.91, 197.19 and 84.68 is: 116.84
Step by Step Solution
- Step 1: Write the proportion equation
142.91 : 197.19 = 84.68 : x - Step 2: Convert to fraction form
142.91/197.19 = 84.68/x - Step 3: Cross multiply
142.91x = 197.19 × 84.68 - Step 4: Simplify right side
142.91x = 16,698.05 - Step 5: Solve for x
x = 16,698.05/142.91 - Step 6: Final answer
x = 116.84
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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.