Finding the Fourth Proportional to 84.21, 126.18 and 69.63
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Solution
The fourth proportional to 84.21, 126.18 and 69.63 is: 104.33
Step by Step Solution
- Step 1: Write the proportion equation
84.21 : 126.18 = 69.63 : x - Step 2: Convert to fraction form
84.21/126.18 = 69.63/x - Step 3: Cross multiply
84.21x = 126.18 × 69.63 - Step 4: Simplify right side
84.21x = 8,785.91 - Step 5: Solve for x
x = 8,785.91/84.21 - Step 6: Final answer
x = 104.33
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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.