Finding the Fourth Proportional to 91,891.36, 126,778.49 and 57,412.70
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Solution
The fourth proportional to 91,891.36, 126,778.49 and 57,412.70 is: 79,209.79
Step by Step Solution
- Step 1: Write the proportion equation
91,891.36 : 126,778.49 = 57,412.70 : x - Step 2: Convert to fraction form
91,891.36/126,778.49 = 57,412.70/x - Step 3: Cross multiply
91,891.36x = 126,778.49 × 57,412.70 - Step 4: Simplify right side
91,891.36x = 7,278,695,344.06 - Step 5: Solve for x
x = 7,278,695,344.06/91,891.36 - Step 6: Final answer
x = 79,209.79
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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.