Finding the Fourth Proportional to 120.16, 180.50 and 74.55
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Solution
The fourth proportional to 120.16, 180.50 and 74.55 is: 111.99
Step by Step Solution
- Step 1: Write the proportion equation
120.16 : 180.50 = 74.55 : x - Step 2: Convert to fraction form
120.16/180.50 = 74.55/x - Step 3: Cross multiply
120.16x = 180.50 × 74.55 - Step 4: Simplify right side
120.16x = 13,456.28 - Step 5: Solve for x
x = 13,456.28/120.16 - Step 6: Final answer
x = 111.99
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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.