Finding the Fourth Proportional to 132.36, 198.36 and 81
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Solution
The fourth proportional to 132.36, 198.36 and 81 is: 121.39
Step by Step Solution
- Step 1: Write the proportion equation
132.36 : 198.36 = 81 : x - Step 2: Convert to fraction form
132.36/198.36 = 81/x - Step 3: Cross multiply
132.36x = 198.36 × 81 - Step 4: Simplify right side
132.36x = 16,067.16 - Step 5: Solve for x
x = 16,067.16/132.36 - Step 6: Final answer
x = 121.39
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.