Finding the Fourth Proportional to 132.21, 198.14 and 74.43
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Solution
The fourth proportional to 132.21, 198.14 and 74.43 is: 111.54
Step by Step Solution
- Step 1: Write the proportion equation
132.21 : 198.14 = 74.43 : x - Step 2: Convert to fraction form
132.21/198.14 = 74.43/x - Step 3: Cross multiply
132.21x = 198.14 × 74.43 - Step 4: Simplify right side
132.21x = 14,747.19 - Step 5: Solve for x
x = 14,747.19/132.21 - Step 6: Final answer
x = 111.54
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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.