Finding the Fourth Proportional to 84.69, 126.97 and 68.63
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Solution
The fourth proportional to 84.69, 126.97 and 68.63 is: 102.88
Step by Step Solution
- Step 1: Write the proportion equation
84.69 : 126.97 = 68.63 : x - Step 2: Convert to fraction form
84.69/126.97 = 68.63/x - Step 3: Cross multiply
84.69x = 126.97 × 68.63 - Step 4: Simplify right side
84.69x = 8,713.14 - Step 5: Solve for x
x = 8,713.14/84.69 - Step 6: Final answer
x = 102.88
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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.