Finding the Fourth Proportional to 201,855.75, 278,560.94 and 112,431.75
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Solution
The fourth proportional to 201,855.75, 278,560.94 and 112,431.75 is: 155,155.82
Step by Step Solution
- Step 1: Write the proportion equation
201,855.75 : 278,560.94 = 112,431.75 : x - Step 2: Convert to fraction form
201,855.75/278,560.94 = 112,431.75/x - Step 3: Cross multiply
201,855.75x = 278,560.94 × 112,431.75 - Step 4: Simplify right side
201,855.75x = 31,319,093,965.85 - Step 5: Solve for x
x = 31,319,093,965.85/201,855.75 - Step 6: Final answer
x = 155,155.82
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.