Finding the Fourth Proportional to 135.42, 203.09 and 74.47
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Solution
The fourth proportional to 135.42, 203.09 and 74.47 is: 111.68
Step by Step Solution
- Step 1: Write the proportion equation
135.42 : 203.09 = 74.47 : x - Step 2: Convert to fraction form
135.42/203.09 = 74.47/x - Step 3: Cross multiply
135.42x = 203.09 × 74.47 - Step 4: Simplify right side
135.42x = 15,123.99 - Step 5: Solve for x
x = 15,123.99/135.42 - Step 6: Final answer
x = 111.68
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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.