Finding the Fourth Proportional to 84.46, 126.62 and 76.94
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Solution
The fourth proportional to 84.46, 126.62 and 76.94 is: 115.34
Step by Step Solution
- Step 1: Write the proportion equation
84.46 : 126.62 = 76.94 : x - Step 2: Convert to fraction form
84.46/126.62 = 76.94/x - Step 3: Cross multiply
84.46x = 126.62 × 76.94 - Step 4: Simplify right side
84.46x = 9,741.13 - Step 5: Solve for x
x = 9,741.13/84.46 - Step 6: Final answer
x = 115.34
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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.