Finding the Fourth Proportional to 74.34, 111.36 and 40.05
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Solution
The fourth proportional to 74.34, 111.36 and 40.05 is: 59.99
Step by Step Solution
- Step 1: Write the proportion equation
74.34 : 111.36 = 40.05 : x - Step 2: Convert to fraction form
74.34/111.36 = 40.05/x - Step 3: Cross multiply
74.34x = 111.36 × 40.05 - Step 4: Simplify right side
74.34x = 4,459.97 - Step 5: Solve for x
x = 4,459.97/74.34 - Step 6: Final answer
x = 59.99
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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.