Finding the Fourth Proportional to 74,135.20, 111,202.80 and 18,731.20
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Solution
The fourth proportional to 74,135.20, 111,202.80 and 18,731.20 is: 28,096.80
Step by Step Solution
- Step 1: Write the proportion equation
74,135.20 : 111,202.80 = 18,731.20 : x - Step 2: Convert to fraction form
74,135.20/111,202.80 = 18,731.20/x - Step 3: Cross multiply
74,135.20x = 111,202.80 × 18,731.20 - Step 4: Simplify right side
74,135.20x = 2,082,961,887.36 - Step 5: Solve for x
x = 2,082,961,887.36/74,135.20 - Step 6: Final answer
x = 28,096.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.