Finding the Fourth Proportional to 138,193.75, 207,282.39 and 81,299.62
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Solution
The fourth proportional to 138,193.75, 207,282.39 and 81,299.62 is: 121,944.59
Step by Step Solution
- Step 1: Write the proportion equation
138,193.75 : 207,282.39 = 81,299.62 : x - Step 2: Convert to fraction form
138,193.75/207,282.39 = 81,299.62/x - Step 3: Cross multiply
138,193.75x = 207,282.39 × 81,299.62 - Step 4: Simplify right side
138,193.75x = 16,851,979,539.69 - Step 5: Solve for x
x = 16,851,979,539.69/138,193.75 - Step 6: Final answer
x = 121,944.59
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1.5x scale
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.