Finding the Fourth Proportional to 72.33, 108.42 and 38.02
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Solution
The fourth proportional to 72.33, 108.42 and 38.02 is: 56.99
Step by Step Solution
- Step 1: Write the proportion equation
72.33 : 108.42 = 38.02 : x - Step 2: Convert to fraction form
72.33/108.42 = 38.02/x - Step 3: Cross multiply
72.33x = 108.42 × 38.02 - Step 4: Simplify right side
72.33x = 4,122.13 - Step 5: Solve for x
x = 4,122.13/72.33 - Step 6: Final answer
x = 56.99
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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.