Finding the Fourth Proportional to 91,609.74, 137,489.97 and 39,078.54
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Solution
The fourth proportional to 91,609.74, 137,489.97 and 39,078.54 is: 58,649.96
Step by Step Solution
- Step 1: Write the proportion equation
91,609.74 : 137,489.97 = 39,078.54 : x - Step 2: Convert to fraction form
91,609.74/137,489.97 = 39,078.54/x - Step 3: Cross multiply
91,609.74x = 137,489.97 × 39,078.54 - Step 4: Simplify right side
91,609.74x = 5,372,907,292.24 - Step 5: Solve for x
x = 5,372,907,292.24/91,609.74 - Step 6: Final answer
x = 58,649.96
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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.