Finding the Fourth Proportional to 84.76, 126.96 and 68.44
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Solution
The fourth proportional to 84.76, 126.96 and 68.44 is: 102.51
Step by Step Solution
- Step 1: Write the proportion equation
84.76 : 126.96 = 68.44 : x - Step 2: Convert to fraction form
84.76/126.96 = 68.44/x - Step 3: Cross multiply
84.76x = 126.96 × 68.44 - Step 4: Simplify right side
84.76x = 8,689.14 - Step 5: Solve for x
x = 8,689.14/84.76 - Step 6: Final answer
x = 102.51
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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.