Finding the Fourth Proportional to 78,468.75, 117,754.97 and 36,918.99
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Solution
The fourth proportional to 78,468.75, 117,754.97 and 36,918.99 is: 55,402.88
Step by Step Solution
- Step 1: Write the proportion equation
78,468.75 : 117,754.97 = 36,918.99 : x - Step 2: Convert to fraction form
78,468.75/117,754.97 = 36,918.99/x - Step 3: Cross multiply
78,468.75x = 117,754.97 × 36,918.99 - Step 4: Simplify right side
78,468.75x = 4,347,394,375.29 - Step 5: Solve for x
x = 4,347,394,375.29/78,468.75 - Step 6: Final answer
x = 55,402.88
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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.