Finding the Fourth Proportional to 87.08, 120.11 and 74.43
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Solution
The fourth proportional to 87.08, 120.11 and 74.43 is: 102.66
Step by Step Solution
- Step 1: Write the proportion equation
87.08 : 120.11 = 74.43 : x - Step 2: Convert to fraction form
87.08/120.11 = 74.43/x - Step 3: Cross multiply
87.08x = 120.11 × 74.43 - Step 4: Simplify right side
87.08x = 8,939.42 - Step 5: Solve for x
x = 8,939.42/87.08 - Step 6: Final answer
x = 102.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.