Finding the Fourth Proportional to 82,408.05, 122,919.28 and 74,840.09
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Solution
The fourth proportional to 82,408.05, 122,919.28 and 74,840.09 is: 111,630.95
Step by Step Solution
- Step 1: Write the proportion equation
82,408.05 : 122,919.28 = 74,840.09 : x - Step 2: Convert to fraction form
82,408.05/122,919.28 = 74,840.09/x - Step 3: Cross multiply
82,408.05x = 122,919.28 × 74,840.09 - Step 4: Simplify right side
82,408.05x = 9,199,289,176.24 - Step 5: Solve for x
x = 9,199,289,176.24/82,408.05 - Step 6: Final answer
x = 111,630.95
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.