Finding the Fourth Proportional to 138.70, 207.44 and 113.18
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Solution
The fourth proportional to 138.70, 207.44 and 113.18 is: 169.28
Step by Step Solution
- Step 1: Write the proportion equation
138.70 : 207.44 = 113.18 : x - Step 2: Convert to fraction form
138.70/207.44 = 113.18/x - Step 3: Cross multiply
138.70x = 207.44 × 113.18 - Step 4: Simplify right side
138.70x = 23,477.73 - Step 5: Solve for x
x = 23,477.73/138.70 - Step 6: Final answer
x = 169.28
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.