Finding the Fourth Proportional to 84.66, 126.99 and 68.60
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Solution
The fourth proportional to 84.66, 126.99 and 68.60 is: 102.89
Step by Step Solution
- Step 1: Write the proportion equation
84.66 : 126.99 = 68.60 : x - Step 2: Convert to fraction form
84.66/126.99 = 68.60/x - Step 3: Cross multiply
84.66x = 126.99 × 68.60 - Step 4: Simplify right side
84.66x = 8,710.88 - Step 5: Solve for x
x = 8,710.88/84.66 - Step 6: Final answer
x = 102.89
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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.