Finding the Fourth Proportional to 136,902.62, 205,419.21 and 74,571.74
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Solution
The fourth proportional to 136,902.62, 205,419.21 and 74,571.74 is: 111,893.17
Step by Step Solution
- Step 1: Write the proportion equation
136,902.62 : 205,419.21 = 74,571.74 : x - Step 2: Convert to fraction form
136,902.62/205,419.21 = 74,571.74/x - Step 3: Cross multiply
136,902.62x = 205,419.21 × 74,571.74 - Step 4: Simplify right side
136,902.62x = 15,318,467,919.13 - Step 5: Solve for x
x = 15,318,467,919.13/136,902.62 - Step 6: Final answer
x = 111,893.17
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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.