Finding the Fourth Proportional to 133.20, 183.80 and 74.19
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Solution
The fourth proportional to 133.20, 183.80 and 74.19 is: 102.37
Step by Step Solution
- Step 1: Write the proportion equation
133.20 : 183.80 = 74.19 : x - Step 2: Convert to fraction form
133.20/183.80 = 74.19/x - Step 3: Cross multiply
133.20x = 183.80 × 74.19 - Step 4: Simplify right side
133.20x = 13,636.12 - Step 5: Solve for x
x = 13,636.12/133.20 - Step 6: Final answer
x = 102.37
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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.