Finding the Fourth Proportional to 79,748.70, 119,640.21 and 39,789.17
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Solution
The fourth proportional to 79,748.70, 119,640.21 and 39,789.17 is: 59,692.32
Step by Step Solution
- Step 1: Write the proportion equation
79,748.70 : 119,640.21 = 39,789.17 : x - Step 2: Convert to fraction form
79,748.70/119,640.21 = 39,789.17/x - Step 3: Cross multiply
79,748.70x = 119,640.21 × 39,789.17 - Step 4: Simplify right side
79,748.70x = 4,760,384,654.53 - Step 5: Solve for x
x = 4,760,384,654.53/79,748.70 - Step 6: Final answer
x = 59,692.32
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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.