Finding the Fourth Proportional to 78,523.49, 117,717.20 and 31,745.99
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Solution
The fourth proportional to 78,523.49, 117,717.20 and 31,745.99 is: 47,591.48
Step by Step Solution
- Step 1: Write the proportion equation
78,523.49 : 117,717.20 = 31,745.99 : x - Step 2: Convert to fraction form
78,523.49/117,717.20 = 31,745.99/x - Step 3: Cross multiply
78,523.49x = 117,717.20 × 31,745.99 - Step 4: Simplify right side
78,523.49x = 3,737,049,308.64 - Step 5: Solve for x
x = 3,737,049,308.64/78,523.49 - Step 6: Final answer
x = 47,591.48
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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.