Finding the Fourth Proportional to 122.12, 183.21 and 76.53
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Solution
The fourth proportional to 122.12, 183.21 and 76.53 is: 114.81
Step by Step Solution
- Step 1: Write the proportion equation
122.12 : 183.21 = 76.53 : x - Step 2: Convert to fraction form
122.12/183.21 = 76.53/x - Step 3: Cross multiply
122.12x = 183.21 × 76.53 - Step 4: Simplify right side
122.12x = 14,021.06 - Step 5: Solve for x
x = 14,021.06/122.12 - Step 6: Final answer
x = 114.81
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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.