Finding the Fourth Proportional to 128,424.44, 177,216.09 and 71,824.88
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Solution
The fourth proportional to 128,424.44, 177,216.09 and 71,824.88 is: 99,112.94
Step by Step Solution
- Step 1: Write the proportion equation
128,424.44 : 177,216.09 = 71,824.88 : x - Step 2: Convert to fraction form
128,424.44/177,216.09 = 71,824.88/x - Step 3: Cross multiply
128,424.44x = 177,216.09 × 71,824.88 - Step 4: Simplify right side
128,424.44x = 12,728,523,512.24 - Step 5: Solve for x
x = 12,728,523,512.24/128,424.44 - Step 6: Final answer
x = 99,112.94
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1.5x scale
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.