Finding the Fourth Proportional to 121.03, 167.18 and 115.65
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Solution
The fourth proportional to 121.03, 167.18 and 115.65 is: 159.75
Step by Step Solution
- Step 1: Write the proportion equation
121.03 : 167.18 = 115.65 : x - Step 2: Convert to fraction form
121.03/167.18 = 115.65/x - Step 3: Cross multiply
121.03x = 167.18 × 115.65 - Step 4: Simplify right side
121.03x = 19,333.79 - Step 5: Solve for x
x = 19,333.79/121.03 - Step 6: Final answer
x = 159.75
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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.