Finding the Fourth Proportional to 84.36, 126.41 and 36.21
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Solution
The fourth proportional to 84.36, 126.41 and 36.21 is: 54.26
Step by Step Solution
- Step 1: Write the proportion equation
84.36 : 126.41 = 36.21 : x - Step 2: Convert to fraction form
84.36/126.41 = 36.21/x - Step 3: Cross multiply
84.36x = 126.41 × 36.21 - Step 4: Simplify right side
84.36x = 4,577.13 - Step 5: Solve for x
x = 4,577.13/84.36 - Step 6: Final answer
x = 54.26
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.