Finding the Fourth Proportional to 121.72, 182.04 and 90.94
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Solution
The fourth proportional to 121.72, 182.04 and 90.94 is: 136.01
Step by Step Solution
- Step 1: Write the proportion equation
121.72 : 182.04 = 90.94 : x - Step 2: Convert to fraction form
121.72/182.04 = 90.94/x - Step 3: Cross multiply
121.72x = 182.04 × 90.94 - Step 4: Simplify right side
121.72x = 16,554.72 - Step 5: Solve for x
x = 16,554.72/121.72 - Step 6: Final answer
x = 136.01
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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.