Finding the Fourth Proportional to 138,015.09, 206,758.65 and 115,668.75
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Solution
The fourth proportional to 138,015.09, 206,758.65 and 115,668.75 is: 173,281.88
Step by Step Solution
- Step 1: Write the proportion equation
138,015.09 : 206,758.65 = 115,668.75 : x - Step 2: Convert to fraction form
138,015.09/206,758.65 = 115,668.75/x - Step 3: Cross multiply
138,015.09x = 206,758.65 × 115,668.75 - Step 4: Simplify right side
138,015.09x = 23,915,514,597.19 - Step 5: Solve for x
x = 23,915,514,597.19/138,015.09 - Step 6: Final answer
x = 173,281.88
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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.