Finding the Fourth Proportional to 74.74, 112.10 and 25.99
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Solution
The fourth proportional to 74.74, 112.10 and 25.99 is: 38.98
Step by Step Solution
- Step 1: Write the proportion equation
74.74 : 112.10 = 25.99 : x - Step 2: Convert to fraction form
74.74/112.10 = 25.99/x - Step 3: Cross multiply
74.74x = 112.10 × 25.99 - Step 4: Simplify right side
74.74x = 2,913.48 - Step 5: Solve for x
x = 2,913.48/74.74 - Step 6: Final answer
x = 38.98
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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.