Finding the Fourth Proportional to 81,072.47, 121,638.74 and 27,769.74
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Solution
The fourth proportional to 81,072.47, 121,638.74 and 27,769.74 is: 41,664.90
Step by Step Solution
- Step 1: Write the proportion equation
81,072.47 : 121,638.74 = 27,769.74 : x - Step 2: Convert to fraction form
81,072.47/121,638.74 = 27,769.74/x - Step 3: Cross multiply
81,072.47x = 121,638.74 × 27,769.74 - Step 4: Simplify right side
81,072.47x = 3,377,876,183.73 - Step 5: Solve for x
x = 3,377,876,183.73/81,072.47 - Step 6: Final answer
x = 41,664.90
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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.