Finding the Fourth Proportional to 138.99, 191.91 and 97.68
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Solution
The fourth proportional to 138.99, 191.91 and 97.68 is: 134.87
Step by Step Solution
- Step 1: Write the proportion equation
138.99 : 191.91 = 97.68 : x - Step 2: Convert to fraction form
138.99/191.91 = 97.68/x - Step 3: Cross multiply
138.99x = 191.91 × 97.68 - Step 4: Simplify right side
138.99x = 18,745.77 - Step 5: Solve for x
x = 18,745.77/138.99 - Step 6: Final answer
x = 134.87
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.