Finding the Fourth Proportional to 111.94, 154.37 and 90.99
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Solution
The fourth proportional to 111.94, 154.37 and 90.99 is: 125.48
Step by Step Solution
- Step 1: Write the proportion equation
111.94 : 154.37 = 90.99 : x - Step 2: Convert to fraction form
111.94/154.37 = 90.99/x - Step 3: Cross multiply
111.94x = 154.37 × 90.99 - Step 4: Simplify right side
111.94x = 14,046.35 - Step 5: Solve for x
x = 14,046.35/111.94 - Step 6: Final answer
x = 125.48
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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.