Finding the Fourth Proportional to 142.11, 212.99 and 68.94
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Solution
The fourth proportional to 142.11, 212.99 and 68.94 is: 103.33
Step by Step Solution
- Step 1: Write the proportion equation
142.11 : 212.99 = 68.94 : x - Step 2: Convert to fraction form
142.11/212.99 = 68.94/x - Step 3: Cross multiply
142.11x = 212.99 × 68.94 - Step 4: Simplify right side
142.11x = 14,683.53 - Step 5: Solve for x
x = 14,683.53/142.11 - Step 6: Final answer
x = 103.33
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.