Finding the Fourth Proportional to 136.24, 187.97 and 80.99
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Solution
The fourth proportional to 136.24, 187.97 and 80.99 is: 111.74
Step by Step Solution
- Step 1: Write the proportion equation
136.24 : 187.97 = 80.99 : x - Step 2: Convert to fraction form
136.24/187.97 = 80.99/x - Step 3: Cross multiply
136.24x = 187.97 × 80.99 - Step 4: Simplify right side
136.24x = 15,223.69 - Step 5: Solve for x
x = 15,223.69/136.24 - Step 6: Final answer
x = 111.74
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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.