Finding the Fourth Proportional to 121,571.28, 167,796.36 and 71,286.48
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Solution
The fourth proportional to 121,571.28, 167,796.36 and 71,286.48 is: 98,391.76
Step by Step Solution
- Step 1: Write the proportion equation
121,571.28 : 167,796.36 = 71,286.48 : x - Step 2: Convert to fraction form
121,571.28/167,796.36 = 71,286.48/x - Step 3: Cross multiply
121,571.28x = 167,796.36 × 71,286.48 - Step 4: Simplify right side
121,571.28x = 11,961,611,861.21 - Step 5: Solve for x
x = 11,961,611,861.21/121,571.28 - Step 6: Final answer
x = 98,391.76
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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.