Finding the Fourth Proportional to 138.96, 207.18 and 126.68
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Solution
The fourth proportional to 138.96, 207.18 and 126.68 is: 188.86
Step by Step Solution
- Step 1: Write the proportion equation
138.96 : 207.18 = 126.68 : x - Step 2: Convert to fraction form
138.96/207.18 = 126.68/x - Step 3: Cross multiply
138.96x = 207.18 × 126.68 - Step 4: Simplify right side
138.96x = 26,244.53 - Step 5: Solve for x
x = 26,244.53/138.96 - Step 6: Final answer
x = 188.86
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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.