Finding the Fourth Proportional to 128,121.97, 191,883.84 and 101,287.63
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Solution
The fourth proportional to 128,121.97, 191,883.84 and 101,287.63 is: 151,694.98
Step by Step Solution
- Step 1: Write the proportion equation
128,121.97 : 191,883.84 = 101,287.63 : x - Step 2: Convert to fraction form
128,121.97/191,883.84 = 101,287.63/x - Step 3: Cross multiply
128,121.97x = 191,883.84 × 101,287.63 - Step 4: Simplify right side
128,121.97x = 19,435,459,388.90 - Step 5: Solve for x
x = 19,435,459,388.90/128,121.97 - Step 6: Final answer
x = 151,694.98
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.