Finding the Fourth Proportional to 138.23, 207.38 and 84.14
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Solution
The fourth proportional to 138.23, 207.38 and 84.14 is: 126.23
Step by Step Solution
- Step 1: Write the proportion equation
138.23 : 207.38 = 84.14 : x - Step 2: Convert to fraction form
138.23/207.38 = 84.14/x - Step 3: Cross multiply
138.23x = 207.38 × 84.14 - Step 4: Simplify right side
138.23x = 17,448.13 - Step 5: Solve for x
x = 17,448.13/138.23 - Step 6: Final answer
x = 126.23
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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.