Finding the Fourth Proportional to 120.99, 166.97 and 68.53
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Solution
The fourth proportional to 120.99, 166.97 and 68.53 is: 94.57
Step by Step Solution
- Step 1: Write the proportion equation
120.99 : 166.97 = 68.53 : x - Step 2: Convert to fraction form
120.99/166.97 = 68.53/x - Step 3: Cross multiply
120.99x = 166.97 × 68.53 - Step 4: Simplify right side
120.99x = 11,442.45 - Step 5: Solve for x
x = 11,442.45/120.99 - Step 6: Final answer
x = 94.57
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.