Finding the Fourth Proportional to 136,836.53, 188,832.62 and 76,408.20
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Solution
The fourth proportional to 136,836.53, 188,832.62 and 76,408.20 is: 105,442.32
Step by Step Solution
- Step 1: Write the proportion equation
136,836.53 : 188,832.62 = 76,408.20 : x - Step 2: Convert to fraction form
136,836.53/188,832.62 = 76,408.20/x - Step 3: Cross multiply
136,836.53x = 188,832.62 × 76,408.20 - Step 4: Simplify right side
136,836.53x = 14,428,360,213.44 - Step 5: Solve for x
x = 14,428,360,213.44/136,836.53 - Step 6: Final answer
x = 105,442.32
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.