Finding the Fourth Proportional to 81,912.92, 122,890.84 and 25,750.76
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Solution
The fourth proportional to 81,912.92, 122,890.84 and 25,750.76 is: 38,632.88
Step by Step Solution
- Step 1: Write the proportion equation
81,912.92 : 122,890.84 = 25,750.76 : x - Step 2: Convert to fraction form
81,912.92/122,890.84 = 25,750.76/x - Step 3: Cross multiply
81,912.92x = 122,890.84 × 25,750.76 - Step 4: Simplify right side
81,912.92x = 3,164,531,848.21 - Step 5: Solve for x
x = 3,164,531,848.21/81,912.92 - Step 6: Final answer
x = 38,632.88
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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.