Finding the Fourth Proportional to 71,628.96, 107,436.12 and 19,043.76
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Solution
The fourth proportional to 71,628.96, 107,436.12 and 19,043.76 is: 28,563.69
Step by Step Solution
- Step 1: Write the proportion equation
71,628.96 : 107,436.12 = 19,043.76 : x - Step 2: Convert to fraction form
71,628.96/107,436.12 = 19,043.76/x - Step 3: Cross multiply
71,628.96x = 107,436.12 × 19,043.76 - Step 4: Simplify right side
71,628.96x = 2,045,987,684.61 - Step 5: Solve for x
x = 2,045,987,684.61/71,628.96 - Step 6: Final answer
x = 28,563.69
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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.