Finding the Fourth Proportional to 157.92, 236.88 and 76.68
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Solution
The fourth proportional to 157.92, 236.88 and 76.68 is: 115.02
Step by Step Solution
- Step 1: Write the proportion equation
157.92 : 236.88 = 76.68 : x - Step 2: Convert to fraction form
157.92/236.88 = 76.68/x - Step 3: Cross multiply
157.92x = 236.88 × 76.68 - Step 4: Simplify right side
157.92x = 18,163.96 - Step 5: Solve for x
x = 18,163.96/157.92 - Step 6: Final answer
x = 115.02
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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.