Finding the Fourth Proportional to 126.46, 174.31 and 84.99
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Solution
The fourth proportional to 126.46, 174.31 and 84.99 is: 117.15
Step by Step Solution
- Step 1: Write the proportion equation
126.46 : 174.31 = 84.99 : x - Step 2: Convert to fraction form
126.46/174.31 = 84.99/x - Step 3: Cross multiply
126.46x = 174.31 × 84.99 - Step 4: Simplify right side
126.46x = 14,815.05 - Step 5: Solve for x
x = 14,815.05/126.46 - Step 6: Final answer
x = 117.15
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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.