Finding the Fourth Proportional to 73.78, 110.66 and 25.70
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Solution
The fourth proportional to 73.78, 110.66 and 25.70 is: 38.55
Step by Step Solution
- Step 1: Write the proportion equation
73.78 : 110.66 = 25.70 : x - Step 2: Convert to fraction form
73.78/110.66 = 25.70/x - Step 3: Cross multiply
73.78x = 110.66 × 25.70 - Step 4: Simplify right side
73.78x = 2,843.96 - Step 5: Solve for x
x = 2,843.96/73.78 - Step 6: Final answer
x = 38.55
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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.