Finding the Fourth Proportional to 129,721.73, 194,588.39 and 39,757.92
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Solution
The fourth proportional to 129,721.73, 194,588.39 and 39,757.92 is: 59,638.66
Step by Step Solution
- Step 1: Write the proportion equation
129,721.73 : 194,588.39 = 39,757.92 : x - Step 2: Convert to fraction form
129,721.73/194,588.39 = 39,757.92/x - Step 3: Cross multiply
129,721.73x = 194,588.39 × 39,757.92 - Step 4: Simplify right side
129,721.73x = 7,736,429,443.76 - Step 5: Solve for x
x = 7,736,429,443.76/129,721.73 - Step 6: Final answer
x = 59,638.66
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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.