Finding the Fourth Proportional to 72.83, 109.15 and 36.72
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Solution
The fourth proportional to 72.83, 109.15 and 36.72 is: 55.03
Step by Step Solution
- Step 1: Write the proportion equation
72.83 : 109.15 = 36.72 : x - Step 2: Convert to fraction form
72.83/109.15 = 36.72/x - Step 3: Cross multiply
72.83x = 109.15 × 36.72 - Step 4: Simplify right side
72.83x = 4,007.90 - Step 5: Solve for x
x = 4,007.90/72.83 - Step 6: Final answer
x = 55.03
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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.