Finding the Fourth Proportional to 81,125.18, 121,391.73 and 47,861.18
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Solution
The fourth proportional to 81,125.18, 121,391.73 and 47,861.18 is: 71,617.12
Step by Step Solution
- Step 1: Write the proportion equation
81,125.18 : 121,391.73 = 47,861.18 : x - Step 2: Convert to fraction form
81,125.18/121,391.73 = 47,861.18/x - Step 3: Cross multiply
81,125.18x = 121,391.73 × 47,861.18 - Step 4: Simplify right side
81,125.18x = 5,809,951,440.04 - Step 5: Solve for x
x = 5,809,951,440.04/81,125.18 - Step 6: Final answer
x = 71,617.12
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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.