Finding the Fourth Proportional to 78,353,091.20, 117,529,636.80 and 27,218,115.20
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Solution
The fourth proportional to 78,353,091.20, 117,529,636.80 and 27,218,115.20 is: 40,827,172.80
Step by Step Solution
- Step 1: Write the proportion equation
78,353,091.20 : 117,529,636.80 = 27,218,115.20 : x - Step 2: Convert to fraction form
78,353,091.20/117,529,636.80 = 27,218,115.20/x - Step 3: Cross multiply
78,353,091.20x = 117,529,636.80 × 27,218,115.20 - Step 4: Simplify right side
78,353,091.20x = 3,198,935,193,836,559 - Step 5: Solve for x
x = 3,198,935,193,836,559/78,353,091.20 - Step 6: Final answer
x = 40,827,172.80
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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.