Finding the Fourth Proportional to 91,190.20, 125,855.69 and 65,780.77
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Solution
The fourth proportional to 91,190.20, 125,855.69 and 65,780.77 is: 90,786.99
Step by Step Solution
- Step 1: Write the proportion equation
91,190.20 : 125,855.69 = 65,780.77 : x - Step 2: Convert to fraction form
91,190.20/125,855.69 = 65,780.77/x - Step 3: Cross multiply
91,190.20x = 125,855.69 × 65,780.77 - Step 4: Simplify right side
91,190.20x = 8,278,884,197.08 - Step 5: Solve for x
x = 8,278,884,197.08/91,190.20 - Step 6: Final answer
x = 90,786.99
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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.