Finding the Fourth Proportional to 91,811,101.20, 137,716,651.80 and 79,853,678.70
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Solution
The fourth proportional to 91,811,101.20, 137,716,651.80 and 79,853,678.70 is: 119,780,518.05
Step by Step Solution
- Step 1: Write the proportion equation
91,811,101.20 : 137,716,651.80 = 79,853,678.70 : x - Step 2: Convert to fraction form
91,811,101.20/137,716,651.80 = 79,853,678.70/x - Step 3: Cross multiply
91,811,101.20x = 137,716,651.80 × 79,853,678.70 - Step 4: Simplify right side
91,811,101.20x = 10,997,181,264,476,978 - Step 5: Solve for x
x = 10,997,181,264,476,978/91,811,101.20 - Step 6: Final answer
x = 119,780,518.05
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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.