Finding the Fourth Proportional to 99,647,936.80, 149,471,905.20 and 85,777,326.70
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Solution
The fourth proportional to 99,647,936.80, 149,471,905.20 and 85,777,326.70 is: 128,665,990.05
Step by Step Solution
- Step 1: Write the proportion equation
99,647,936.80 : 149,471,905.20 = 85,777,326.70 : x - Step 2: Convert to fraction form
99,647,936.80/149,471,905.20 = 85,777,326.70/x - Step 3: Cross multiply
99,647,936.80x = 149,471,905.20 × 85,777,326.70 - Step 4: Simplify right side
99,647,936.80x = 12,821,300,444,811,828 - Step 5: Solve for x
x = 12,821,300,444,811,828/99,647,936.80 - Step 6: Final answer
x = 128,665,990.05
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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.