Finding the Fourth Proportional to 129,107.20, 178,163.19 and 71,750.09
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Solution
The fourth proportional to 129,107.20, 178,163.19 and 71,750.09 is: 99,012.49
Step by Step Solution
- Step 1: Write the proportion equation
129,107.20 : 178,163.19 = 71,750.09 : x - Step 2: Convert to fraction form
129,107.20/178,163.19 = 71,750.09/x - Step 3: Cross multiply
129,107.20x = 178,163.19 × 71,750.09 - Step 4: Simplify right side
129,107.20x = 12,783,224,917.19 - Step 5: Solve for x
x = 12,783,224,917.19/129,107.20 - Step 6: Final answer
x = 99,012.49
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.