Finding the Fourth Proportional to 81.99, 122.87 and 59.18
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Solution
The fourth proportional to 81.99, 122.87 and 59.18 is: 88.68
Step by Step Solution
- Step 1: Write the proportion equation
81.99 : 122.87 = 59.18 : x - Step 2: Convert to fraction form
81.99/122.87 = 59.18/x - Step 3: Cross multiply
81.99x = 122.87 × 59.18 - Step 4: Simplify right side
81.99x = 7,270.98 - Step 5: Solve for x
x = 7,270.98/81.99 - Step 6: Final answer
x = 88.68
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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.