Finding the Fourth Proportional to 128,636.44, 177,523.79 and 74,912.78
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Solution
The fourth proportional to 128,636.44, 177,523.79 and 74,912.78 is: 103,382.84
Step by Step Solution
- Step 1: Write the proportion equation
128,636.44 : 177,523.79 = 74,912.78 : x - Step 2: Convert to fraction form
128,636.44/177,523.79 = 74,912.78/x - Step 3: Cross multiply
128,636.44x = 177,523.79 × 74,912.78 - Step 4: Simplify right side
128,636.44x = 13,298,800,694.28 - Step 5: Solve for x
x = 13,298,800,694.28/128,636.44 - Step 6: Final answer
x = 103,382.84
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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.