Finding the Fourth Proportional to 84.66, 126.79 and 70.08
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Solution
The fourth proportional to 84.66, 126.79 and 70.08 is: 104.95
Step by Step Solution
- Step 1: Write the proportion equation
84.66 : 126.79 = 70.08 : x - Step 2: Convert to fraction form
84.66/126.79 = 70.08/x - Step 3: Cross multiply
84.66x = 126.79 × 70.08 - Step 4: Simplify right side
84.66x = 8,884.79 - Step 5: Solve for x
x = 8,884.79/84.66 - Step 6: Final answer
x = 104.95
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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.