Finding the Fourth Proportional to 130.40, 180.18 and 102.99
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Solution
The fourth proportional to 130.40, 180.18 and 102.99 is: 142.31
Step by Step Solution
- Step 1: Write the proportion equation
130.40 : 180.18 = 102.99 : x - Step 2: Convert to fraction form
130.40/180.18 = 102.99/x - Step 3: Cross multiply
130.40x = 180.18 × 102.99 - Step 4: Simplify right side
130.40x = 18,556.74 - Step 5: Solve for x
x = 18,556.74/130.40 - Step 6: Final answer
x = 142.31
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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.