Finding the Fourth Proportional to 102,457.25, 141,391.61 and 57,138.09
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Solution
The fourth proportional to 102,457.25, 141,391.61 and 57,138.09 is: 78,850.90
Step by Step Solution
- Step 1: Write the proportion equation
102,457.25 : 141,391.61 = 57,138.09 : x - Step 2: Convert to fraction form
102,457.25/141,391.61 = 57,138.09/x - Step 3: Cross multiply
102,457.25x = 141,391.61 × 57,138.09 - Step 4: Simplify right side
102,457.25x = 8,078,846,251.73 - Step 5: Solve for x
x = 8,078,846,251.73/102,457.25 - Step 6: Final answer
x = 78,850.90
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.