Finding the Fourth Proportional to 129.99, 178.97 and 116.58
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Solution
The fourth proportional to 129.99, 178.97 and 116.58 is: 160.50
Step by Step Solution
- Step 1: Write the proportion equation
129.99 : 178.97 = 116.58 : x - Step 2: Convert to fraction form
129.99/178.97 = 116.58/x - Step 3: Cross multiply
129.99x = 178.97 × 116.58 - Step 4: Simplify right side
129.99x = 20,863.74 - Step 5: Solve for x
x = 20,863.74/129.99 - Step 6: Final answer
x = 160.50
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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.