Finding the Fourth Proportional to 138,759.99, 207,135.93 and 121,945.30
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Solution
The fourth proportional to 138,759.99, 207,135.93 and 121,945.30 is: 182,035.57
Step by Step Solution
- Step 1: Write the proportion equation
138,759.99 : 207,135.93 = 121,945.30 : x - Step 2: Convert to fraction form
138,759.99/207,135.93 = 121,945.30/x - Step 3: Cross multiply
138,759.99x = 207,135.93 × 121,945.30 - Step 4: Simplify right side
138,759.99x = 25,259,253,064.08 - Step 5: Solve for x
x = 25,259,253,064.08/138,759.99 - Step 6: Final answer
x = 182,035.57
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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.