Finding the Fourth Proportional to 7,381,138.20, 10,185,977.12 and 4,117,953.60
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Solution
The fourth proportional to 7,381,138.20, 10,185,977.12 and 4,117,953.60 is: 5,682,779.54
Step by Step Solution
- Step 1: Write the proportion equation
7,381,138.20 : 10,185,977.12 = 4,117,953.60 : x - Step 2: Convert to fraction form
7,381,138.20/10,185,977.12 = 4,117,953.60/x - Step 3: Cross multiply
7,381,138.20x = 10,185,977.12 × 4,117,953.60 - Step 4: Simplify right side
7,381,138.20x = 41,945,381,150,821.63 - Step 5: Solve for x
x = 41,945,381,150,821.63/7,381,138.20 - Step 6: Final answer
x = 5,682,779.54
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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.