Finding the Fourth Proportional to 111.68, 154.11 and 68.03
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Solution
The fourth proportional to 111.68, 154.11 and 68.03 is: 93.88
Step by Step Solution
- Step 1: Write the proportion equation
111.68 : 154.11 = 68.03 : x - Step 2: Convert to fraction form
111.68/154.11 = 68.03/x - Step 3: Cross multiply
111.68x = 154.11 × 68.03 - Step 4: Simplify right side
111.68x = 10,484.10 - Step 5: Solve for x
x = 10,484.10/111.68 - Step 6: Final answer
x = 93.88
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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.