Finding the Fourth Proportional to 129,898.20, 194,847.30 and 87,907.80
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Solution
The fourth proportional to 129,898.20, 194,847.30 and 87,907.80 is: 131,861.70
Step by Step Solution
- Step 1: Write the proportion equation
129,898.20 : 194,847.30 = 87,907.80 : x - Step 2: Convert to fraction form
129,898.20/194,847.30 = 87,907.80/x - Step 3: Cross multiply
129,898.20x = 194,847.30 × 87,907.80 - Step 4: Simplify right side
129,898.20x = 17,128,597,478.94 - Step 5: Solve for x
x = 17,128,597,478.94/129,898.20 - Step 6: Final answer
x = 131,861.70
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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.