Finding the Fourth Proportional to 83.20, 124.81 and 29.09
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Solution
The fourth proportional to 83.20, 124.81 and 29.09 is: 43.64
Step by Step Solution
- Step 1: Write the proportion equation
83.20 : 124.81 = 29.09 : x - Step 2: Convert to fraction form
83.20/124.81 = 29.09/x - Step 3: Cross multiply
83.20x = 124.81 × 29.09 - Step 4: Simplify right side
83.20x = 3,630.72 - Step 5: Solve for x
x = 3,630.72/83.20 - Step 6: Final answer
x = 43.64
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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.