Finding the Fourth Proportional to 121.14, 167.26 and 84.34
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Solution
The fourth proportional to 121.14, 167.26 and 84.34 is: 116.45
Step by Step Solution
- Step 1: Write the proportion equation
121.14 : 167.26 = 84.34 : x - Step 2: Convert to fraction form
121.14/167.26 = 84.34/x - Step 3: Cross multiply
121.14x = 167.26 × 84.34 - Step 4: Simplify right side
121.14x = 14,106.71 - Step 5: Solve for x
x = 14,106.71/121.14 - Step 6: Final answer
x = 116.45
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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.