Finding the Fourth Proportional to 81.65, 122.44 and 58.63
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Solution
The fourth proportional to 81.65, 122.44 and 58.63 is: 87.92
Step by Step Solution
- Step 1: Write the proportion equation
81.65 : 122.44 = 58.63 : x - Step 2: Convert to fraction form
81.65/122.44 = 58.63/x - Step 3: Cross multiply
81.65x = 122.44 × 58.63 - Step 4: Simplify right side
81.65x = 7,178.66 - Step 5: Solve for x
x = 7,178.66/81.65 - Step 6: Final answer
x = 87.92
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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.