Finding the Fourth Proportional to 99.68, 149.34 and 72.26
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Solution
The fourth proportional to 99.68, 149.34 and 72.26 is: 108.26
Step by Step Solution
- Step 1: Write the proportion equation
99.68 : 149.34 = 72.26 : x - Step 2: Convert to fraction form
99.68/149.34 = 72.26/x - Step 3: Cross multiply
99.68x = 149.34 × 72.26 - Step 4: Simplify right side
99.68x = 10,791.31 - Step 5: Solve for x
x = 10,791.31/99.68 - Step 6: Final answer
x = 108.26
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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.