Finding the Fourth Proportional to 84.14, 126.12 and 68.96
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Solution
The fourth proportional to 84.14, 126.12 and 68.96 is: 103.37
Step by Step Solution
- Step 1: Write the proportion equation
84.14 : 126.12 = 68.96 : x - Step 2: Convert to fraction form
84.14/126.12 = 68.96/x - Step 3: Cross multiply
84.14x = 126.12 × 68.96 - Step 4: Simplify right side
84.14x = 8,697.24 - Step 5: Solve for x
x = 8,697.24/84.14 - Step 6: Final answer
x = 103.37
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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.