Finding the Fourth Proportional to 138,613.44, 206,917.36 and 121,798.28
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Solution
The fourth proportional to 138,613.44, 206,917.36 and 121,798.28 is: 181,816.27
Step by Step Solution
- Step 1: Write the proportion equation
138,613.44 : 206,917.36 = 121,798.28 : x - Step 2: Convert to fraction form
138,613.44/206,917.36 = 121,798.28/x - Step 3: Cross multiply
138,613.44x = 206,917.36 × 121,798.28 - Step 4: Simplify right side
138,613.44x = 25,202,178,550.14 - Step 5: Solve for x
x = 25,202,178,550.14/138,613.44 - Step 6: Final answer
x = 181,816.27
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.