Finding the Fourth Proportional to 122.98, 169.69 and 70.53
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Solution
The fourth proportional to 122.98, 169.69 and 70.53 is: 97.32
Step by Step Solution
- Step 1: Write the proportion equation
122.98 : 169.69 = 70.53 : x - Step 2: Convert to fraction form
122.98/169.69 = 70.53/x - Step 3: Cross multiply
122.98x = 169.69 × 70.53 - Step 4: Simplify right side
122.98x = 11,968.24 - Step 5: Solve for x
x = 11,968.24/122.98 - Step 6: Final answer
x = 97.32
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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.