Finding the Fourth Proportional to 87.23, 120.62 and 69.91
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Solution
The fourth proportional to 87.23, 120.62 and 69.91 is: 96.67
Step by Step Solution
- Step 1: Write the proportion equation
87.23 : 120.62 = 69.91 : x - Step 2: Convert to fraction form
87.23/120.62 = 69.91/x - Step 3: Cross multiply
87.23x = 120.62 × 69.91 - Step 4: Simplify right side
87.23x = 8,432.42 - Step 5: Solve for x
x = 8,432.42/87.23 - Step 6: Final answer
x = 96.67
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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.