Finding the Fourth Proportional to 135.66, 203.13 and 74.70
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Solution
The fourth proportional to 135.66, 203.13 and 74.70 is: 111.85
Step by Step Solution
- Step 1: Write the proportion equation
135.66 : 203.13 = 74.70 : x - Step 2: Convert to fraction form
135.66/203.13 = 74.70/x - Step 3: Cross multiply
135.66x = 203.13 × 74.70 - Step 4: Simplify right side
135.66x = 15,173.81 - Step 5: Solve for x
x = 15,173.81/135.66 - Step 6: Final answer
x = 111.85
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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.