Finding the Fourth Proportional to 81,371.56, 122,057.37 and 39,243.79
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Solution
The fourth proportional to 81,371.56, 122,057.37 and 39,243.79 is: 58,865.70
Step by Step Solution
- Step 1: Write the proportion equation
81,371.56 : 122,057.37 = 39,243.79 : x - Step 2: Convert to fraction form
81,371.56/122,057.37 = 39,243.79/x - Step 3: Cross multiply
81,371.56x = 122,057.37 × 39,243.79 - Step 4: Simplify right side
81,371.56x = 4,789,993,796.23 - Step 5: Solve for x
x = 4,789,993,796.23/81,371.56 - Step 6: Final answer
x = 58,865.70
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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.