Finding the Fourth Proportional to 82.09, 123.12 and 28
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Solution
The fourth proportional to 82.09, 123.12 and 28 is: 41.99
Step by Step Solution
- Step 1: Write the proportion equation
82.09 : 123.12 = 28 : x - Step 2: Convert to fraction form
82.09/123.12 = 28/x - Step 3: Cross multiply
82.09x = 123.12 × 28 - Step 4: Simplify right side
82.09x = 3,447.36 - Step 5: Solve for x
x = 3,447.36/82.09 - Step 6: Final answer
x = 41.99
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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.