Finding the Fourth Proportional to 118.20, 163.14 and 69.12
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Solution
The fourth proportional to 118.20, 163.14 and 69.12 is: 95.40
Step by Step Solution
- Step 1: Write the proportion equation
118.20 : 163.14 = 69.12 : x - Step 2: Convert to fraction form
118.20/163.14 = 69.12/x - Step 3: Cross multiply
118.20x = 163.14 × 69.12 - Step 4: Simplify right side
118.20x = 11,276.24 - Step 5: Solve for x
x = 11,276.24/118.20 - Step 6: Final answer
x = 95.40
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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.