Finding the Fourth Proportional to 82.99, 124.45 and 57.31
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Solution
The fourth proportional to 82.99, 124.45 and 57.31 is: 85.94
Step by Step Solution
- Step 1: Write the proportion equation
82.99 : 124.45 = 57.31 : x - Step 2: Convert to fraction form
82.99/124.45 = 57.31/x - Step 3: Cross multiply
82.99x = 124.45 × 57.31 - Step 4: Simplify right side
82.99x = 7,132.23 - Step 5: Solve for x
x = 7,132.23/82.99 - Step 6: Final answer
x = 85.94
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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.