Finding the Fourth Proportional to 138,760.49, 207,136.68 and 121,945.80
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Solution
The fourth proportional to 138,760.49, 207,136.68 and 121,945.80 is: 182,036.32
Step by Step Solution
- Step 1: Write the proportion equation
138,760.49 : 207,136.68 = 121,945.80 : x - Step 2: Convert to fraction form
138,760.49/207,136.68 = 121,945.80/x - Step 3: Cross multiply
138,760.49x = 207,136.68 × 121,945.80 - Step 4: Simplify right side
138,760.49x = 25,259,448,151.94 - Step 5: Solve for x
x = 25,259,448,151.94/138,760.49 - Step 6: Final answer
x = 182,036.32
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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.