Finding the Fourth Proportional to 138.30, 201.99 and 138.30
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Solution
The fourth proportional to 138.30, 201.99 and 138.30 is: 201.99
Step by Step Solution
- Step 1: Write the proportion equation
138.30 : 201.99 = 138.30 : x - Step 2: Convert to fraction form
138.30/201.99 = 138.30/x - Step 3: Cross multiply
138.30x = 201.99 × 138.30 - Step 4: Simplify right side
138.30x = 27,935.22 - Step 5: Solve for x
x = 27,935.22/138.30 - Step 6: Final answer
x = 201.99
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Why These Related Problems?
These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.