Finding the Fourth Proportional to 84.24, 115.76 and 68.67
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Solution
The fourth proportional to 84.24, 115.76 and 68.67 is: 94.36
Step by Step Solution
- Step 1: Write the proportion equation
84.24 : 115.76 = 68.67 : x - Step 2: Convert to fraction form
84.24/115.76 = 68.67/x - Step 3: Cross multiply
84.24x = 115.76 × 68.67 - Step 4: Simplify right side
84.24x = 7,949.24 - Step 5: Solve for x
x = 7,949.24/84.24 - Step 6: Final answer
x = 94.36
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.