Finding the Fourth Proportional to 135.20, 202.79 and 43.90
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Solution
The fourth proportional to 135.20, 202.79 and 43.90 is: 65.84
Step by Step Solution
- Step 1: Write the proportion equation
135.20 : 202.79 = 43.90 : x - Step 2: Convert to fraction form
135.20/202.79 = 43.90/x - Step 3: Cross multiply
135.20x = 202.79 × 43.90 - Step 4: Simplify right side
135.20x = 8,902.08 - Step 5: Solve for x
x = 8,902.08/135.20 - Step 6: Final answer
x = 65.84
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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.