Finding the Fourth Proportional to 120.99, 166.74 and 88.19
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Solution
The fourth proportional to 120.99, 166.74 and 88.19 is: 121.54
Step by Step Solution
- Step 1: Write the proportion equation
120.99 : 166.74 = 88.19 : x - Step 2: Convert to fraction form
120.99/166.74 = 88.19/x - Step 3: Cross multiply
120.99x = 166.74 × 88.19 - Step 4: Simplify right side
120.99x = 14,704.80 - Step 5: Solve for x
x = 14,704.80/120.99 - Step 6: Final answer
x = 121.54
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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.