Finding the Fourth Proportional to 72.04, 108.24 and 69.88
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Solution
The fourth proportional to 72.04, 108.24 and 69.88 is: 104.99
Step by Step Solution
- Step 1: Write the proportion equation
72.04 : 108.24 = 69.88 : x - Step 2: Convert to fraction form
72.04/108.24 = 69.88/x - Step 3: Cross multiply
72.04x = 108.24 × 69.88 - Step 4: Simplify right side
72.04x = 7,563.81 - Step 5: Solve for x
x = 7,563.81/72.04 - Step 6: Final answer
x = 104.99
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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.