Finding the Fourth Proportional to 173.70, 239.79 and 115.65
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Solution
The fourth proportional to 173.70, 239.79 and 115.65 is: 159.65
Step by Step Solution
- Step 1: Write the proportion equation
173.70 : 239.79 = 115.65 : x - Step 2: Convert to fraction form
173.70/239.79 = 115.65/x - Step 3: Cross multiply
173.70x = 239.79 × 115.65 - Step 4: Simplify right side
173.70x = 27,731.71 - Step 5: Solve for x
x = 27,731.71/173.70 - Step 6: Final answer
x = 159.65
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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.