Finding the Fourth Proportional to 129.36, 177.18 and 124.74
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Solution
The fourth proportional to 129.36, 177.18 and 124.74 is: 170.85
Step by Step Solution
- Step 1: Write the proportion equation
129.36 : 177.18 = 124.74 : x - Step 2: Convert to fraction form
129.36/177.18 = 124.74/x - Step 3: Cross multiply
129.36x = 177.18 × 124.74 - Step 4: Simplify right side
129.36x = 22,101.43 - Step 5: Solve for x
x = 22,101.43/129.36 - Step 6: Final answer
x = 170.85
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.