Finding the Fourth Proportional to 121.53, 167.73 and 84.75
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Solution
The fourth proportional to 121.53, 167.73 and 84.75 is: 116.97
Step by Step Solution
- Step 1: Write the proportion equation
121.53 : 167.73 = 84.75 : x - Step 2: Convert to fraction form
121.53/167.73 = 84.75/x - Step 3: Cross multiply
121.53x = 167.73 × 84.75 - Step 4: Simplify right side
121.53x = 14,215.12 - Step 5: Solve for x
x = 14,215.12/121.53 - Step 6: Final answer
x = 116.97
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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.