Finding the Fourth Proportional to 138,339.92, 190,916.19 and 84,608.07
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Solution
The fourth proportional to 138,339.92, 190,916.19 and 84,608.07 is: 116,763.48
Step by Step Solution
- Step 1: Write the proportion equation
138,339.92 : 190,916.19 = 84,608.07 : x - Step 2: Convert to fraction form
138,339.92/190,916.19 = 84,608.07/x - Step 3: Cross multiply
138,339.92x = 190,916.19 × 84,608.07 - Step 4: Simplify right side
138,339.92x = 16,153,050,367.65 - Step 5: Solve for x
x = 16,153,050,367.65/138,339.92 - Step 6: Final answer
x = 116,763.48
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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.