Finding the Fourth Proportional to 113.19, 156.21 and 68.92
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Solution
The fourth proportional to 113.19, 156.21 and 68.92 is: 95.11
Step by Step Solution
- Step 1: Write the proportion equation
113.19 : 156.21 = 68.92 : x - Step 2: Convert to fraction form
113.19/156.21 = 68.92/x - Step 3: Cross multiply
113.19x = 156.21 × 68.92 - Step 4: Simplify right side
113.19x = 10,765.99 - Step 5: Solve for x
x = 10,765.99/113.19 - Step 6: Final answer
x = 95.11
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.