Finding the Fourth Proportional to 87.08, 120.08 and 68.65
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Solution
The fourth proportional to 87.08, 120.08 and 68.65 is: 94.67
Step by Step Solution
- Step 1: Write the proportion equation
87.08 : 120.08 = 68.65 : x - Step 2: Convert to fraction form
87.08/120.08 = 68.65/x - Step 3: Cross multiply
87.08x = 120.08 × 68.65 - Step 4: Simplify right side
87.08x = 8,243.36 - Step 5: Solve for x
x = 8,243.36/87.08 - Step 6: Final answer
x = 94.67
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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.