Finding the Fourth Proportional to 128,491.44, 177,369.18 and 87,107.94
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Solution
The fourth proportional to 128,491.44, 177,369.18 and 87,107.94 is: 120,243.53
Step by Step Solution
- Step 1: Write the proportion equation
128,491.44 : 177,369.18 = 87,107.94 : x - Step 2: Convert to fraction form
128,491.44/177,369.18 = 87,107.94/x - Step 3: Cross multiply
128,491.44x = 177,369.18 × 87,107.94 - Step 4: Simplify right side
128,491.44x = 15,450,263,889.29 - Step 5: Solve for x
x = 15,450,263,889.29/128,491.44 - Step 6: Final answer
x = 120,243.53
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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.