Finding the Fourth Proportional to 91,880.76, 137,840.77 and 31,911.09
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Solution
The fourth proportional to 91,880.76, 137,840.77 and 31,911.09 is: 47,873.45
Step by Step Solution
- Step 1: Write the proportion equation
91,880.76 : 137,840.77 = 31,911.09 : x - Step 2: Convert to fraction form
91,880.76/137,840.77 = 31,911.09/x - Step 3: Cross multiply
91,880.76x = 137,840.77 × 31,911.09 - Step 4: Simplify right side
91,880.76x = 4,398,649,217.14 - Step 5: Solve for x
x = 4,398,649,217.14/91,880.76 - Step 6: Final answer
x = 47,873.45
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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.