Finding the Fourth Proportional to 86.41, 118.99 and 74.12
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Solution
The fourth proportional to 86.41, 118.99 and 74.12 is: 102.07
Step by Step Solution
- Step 1: Write the proportion equation
86.41 : 118.99 = 74.12 : x - Step 2: Convert to fraction form
86.41/118.99 = 74.12/x - Step 3: Cross multiply
86.41x = 118.99 × 74.12 - Step 4: Simplify right side
86.41x = 8,819.54 - Step 5: Solve for x
x = 8,819.54/86.41 - Step 6: Final answer
x = 102.07
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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.