Finding the Fourth Proportional to 129,674.52, 178,947.63 and 72,324.09
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Solution
The fourth proportional to 129,674.52, 178,947.63 and 72,324.09 is: 99,805.46
Step by Step Solution
- Step 1: Write the proportion equation
129,674.52 : 178,947.63 = 72,324.09 : x - Step 2: Convert to fraction form
129,674.52/178,947.63 = 72,324.09/x - Step 3: Cross multiply
129,674.52x = 178,947.63 × 72,324.09 - Step 4: Simplify right side
129,674.52x = 12,942,224,497.41 - Step 5: Solve for x
x = 12,942,224,497.41/129,674.52 - Step 6: Final answer
x = 99,805.46
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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.