Finding the Fourth Proportional to 74.88, 112.08 and 58.68
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Solution
The fourth proportional to 74.88, 112.08 and 58.68 is: 87.83
Step by Step Solution
- Step 1: Write the proportion equation
74.88 : 112.08 = 58.68 : x - Step 2: Convert to fraction form
74.88/112.08 = 58.68/x - Step 3: Cross multiply
74.88x = 112.08 × 58.68 - Step 4: Simplify right side
74.88x = 6,576.85 - Step 5: Solve for x
x = 6,576.85/74.88 - Step 6: Final answer
x = 87.83
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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.