Finding the Fourth Proportional to 113.10, 156.09 and 63.99
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Solution
The fourth proportional to 113.10, 156.09 and 63.99 is: 88.30
Step by Step Solution
- Step 1: Write the proportion equation
113.10 : 156.09 = 63.99 : x - Step 2: Convert to fraction form
113.10/156.09 = 63.99/x - Step 3: Cross multiply
113.10x = 156.09 × 63.99 - Step 4: Simplify right side
113.10x = 9,987.49 - Step 5: Solve for x
x = 9,987.49/113.10 - Step 6: Final answer
x = 88.30
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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.