Finding the Fourth Proportional to 91,121.81, 125,680.19 and 66,915.18
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Solution
The fourth proportional to 91,121.81, 125,680.19 and 66,915.18 is: 92,293.08
Step by Step Solution
- Step 1: Write the proportion equation
91,121.81 : 125,680.19 = 66,915.18 : x - Step 2: Convert to fraction form
91,121.81/125,680.19 = 66,915.18/x - Step 3: Cross multiply
91,121.81x = 125,680.19 × 66,915.18 - Step 4: Simplify right side
91,121.81x = 8,409,912,201.71 - Step 5: Solve for x
x = 8,409,912,201.71/91,121.81 - Step 6: Final answer
x = 92,293.08
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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.