Finding the Fourth Proportional to 171.19, 236.09 and 136.18
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Solution
The fourth proportional to 171.19, 236.09 and 136.18 is: 187.80
Step by Step Solution
- Step 1: Write the proportion equation
171.19 : 236.09 = 136.18 : x - Step 2: Convert to fraction form
171.19/236.09 = 136.18/x - Step 3: Cross multiply
171.19x = 236.09 × 136.18 - Step 4: Simplify right side
171.19x = 32,148.87 - Step 5: Solve for x
x = 32,148.87/171.19 - Step 6: Final answer
x = 187.80
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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.