Finding the Fourth Proportional to 111.12, 153.34 and 69.09
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Solution
The fourth proportional to 111.12, 153.34 and 69.09 is: 95.34
Step by Step Solution
- Step 1: Write the proportion equation
111.12 : 153.34 = 69.09 : x - Step 2: Convert to fraction form
111.12/153.34 = 69.09/x - Step 3: Cross multiply
111.12x = 153.34 × 69.09 - Step 4: Simplify right side
111.12x = 10,594.26 - Step 5: Solve for x
x = 10,594.26/111.12 - Step 6: Final answer
x = 95.34
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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.