Finding the Fourth Proportional to 138,855.21, 191,620.26 and 75,193.05
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Solution
The fourth proportional to 138,855.21, 191,620.26 and 75,193.05 is: 103,766.45
Step by Step Solution
- Step 1: Write the proportion equation
138,855.21 : 191,620.26 = 75,193.05 : x - Step 2: Convert to fraction form
138,855.21/191,620.26 = 75,193.05/x - Step 3: Cross multiply
138,855.21x = 191,620.26 × 75,193.05 - Step 4: Simplify right side
138,855.21x = 14,408,511,791.19 - Step 5: Solve for x
x = 14,408,511,791.19/138,855.21 - Step 6: Final answer
x = 103,766.45
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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.