Finding the Fourth Proportional to 135.41, 202.68 and 122.78
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Solution
The fourth proportional to 135.41, 202.68 and 122.78 is: 183.78
Step by Step Solution
- Step 1: Write the proportion equation
135.41 : 202.68 = 122.78 : x - Step 2: Convert to fraction form
135.41/202.68 = 122.78/x - Step 3: Cross multiply
135.41x = 202.68 × 122.78 - Step 4: Simplify right side
135.41x = 24,885.05 - Step 5: Solve for x
x = 24,885.05/135.41 - Step 6: Final answer
x = 183.78
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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.