Finding the Fourth Proportional to 130.99, 180.69 and 84.40
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Solution
The fourth proportional to 130.99, 180.69 and 84.40 is: 116.42
Step by Step Solution
- Step 1: Write the proportion equation
130.99 : 180.69 = 84.40 : x - Step 2: Convert to fraction form
130.99/180.69 = 84.40/x - Step 3: Cross multiply
130.99x = 180.69 × 84.40 - Step 4: Simplify right side
130.99x = 15,250.24 - Step 5: Solve for x
x = 15,250.24/130.99 - Step 6: Final answer
x = 116.42
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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.