Finding the Fourth Proportional to 132.68, 198.99 and 81.30
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Solution
The fourth proportional to 132.68, 198.99 and 81.30 is: 121.94
Step by Step Solution
- Step 1: Write the proportion equation
132.68 : 198.99 = 81.30 : x - Step 2: Convert to fraction form
132.68/198.99 = 81.30/x - Step 3: Cross multiply
132.68x = 198.99 × 81.30 - Step 4: Simplify right side
132.68x = 16,177.89 - Step 5: Solve for x
x = 16,177.89/132.68 - Step 6: Final answer
x = 121.94
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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.