Finding the Fourth Proportional to 128,376.21, 177,170.21 and 74,657.44
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Solution
The fourth proportional to 128,376.21, 177,170.21 and 74,657.44 is: 103,033.69
Step by Step Solution
- Step 1: Write the proportion equation
128,376.21 : 177,170.21 = 74,657.44 : x - Step 2: Convert to fraction form
128,376.21/177,170.21 = 74,657.44/x - Step 3: Cross multiply
128,376.21x = 177,170.21 × 74,657.44 - Step 4: Simplify right side
128,376.21x = 13,227,074,066.58 - Step 5: Solve for x
x = 13,227,074,066.58/128,376.21 - Step 6: Final answer
x = 103,033.69
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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.