Finding the Fourth Proportional to 138.72, 207.82 and 97.99
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Solution
The fourth proportional to 138.72, 207.82 and 97.99 is: 146.80
Step by Step Solution
- Step 1: Write the proportion equation
138.72 : 207.82 = 97.99 : x - Step 2: Convert to fraction form
138.72/207.82 = 97.99/x - Step 3: Cross multiply
138.72x = 207.82 × 97.99 - Step 4: Simplify right side
138.72x = 20,364.28 - Step 5: Solve for x
x = 20,364.28/138.72 - Step 6: Final answer
x = 146.80
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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.