Finding the Fourth Proportional to 138,343.94, 190,839.21 and 120,407.30
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Solution
The fourth proportional to 138,343.94, 190,839.21 and 120,407.30 is: 166,096.43
Step by Step Solution
- Step 1: Write the proportion equation
138,343.94 : 190,839.21 = 120,407.30 : x - Step 2: Convert to fraction form
138,343.94/190,839.21 = 120,407.30/x - Step 3: Cross multiply
138,343.94x = 190,839.21 × 120,407.30 - Step 4: Simplify right side
138,343.94x = 22,978,434,010.23 - Step 5: Solve for x
x = 22,978,434,010.23/138,343.94 - Step 6: Final answer
x = 166,096.43
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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.