Finding the Fourth Proportional to 157.97, 236.76 and 81.08
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Solution
The fourth proportional to 157.97, 236.76 and 81.08 is: 121.52
Step by Step Solution
- Step 1: Write the proportion equation
157.97 : 236.76 = 81.08 : x - Step 2: Convert to fraction form
157.97/236.76 = 81.08/x - Step 3: Cross multiply
157.97x = 236.76 × 81.08 - Step 4: Simplify right side
157.97x = 19,195.32 - Step 5: Solve for x
x = 19,195.32/157.97 - Step 6: Final answer
x = 121.52
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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.