Finding the Fourth Proportional to 91,239,620.80, 136,859,431.20 and 85,193,003.20
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Solution
The fourth proportional to 91,239,620.80, 136,859,431.20 and 85,193,003.20 is: 127,789,504.80
Step by Step Solution
- Step 1: Write the proportion equation
91,239,620.80 : 136,859,431.20 = 85,193,003.20 : x - Step 2: Convert to fraction form
91,239,620.80/136,859,431.20 = 85,193,003.20/x - Step 3: Cross multiply
91,239,620.80x = 136,859,431.20 × 85,193,003.20 - Step 4: Simplify right side
91,239,620.80x = 11,659,465,960,171,780 - Step 5: Solve for x
x = 11,659,465,960,171,780/91,239,620.80 - Step 6: Final answer
x = 127,789,504.80
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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.