Finding the Fourth Proportional to 77,145.44, 115,783.91 and 30,431.12
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Solution
The fourth proportional to 77,145.44, 115,783.91 and 30,431.12 is: 45,672.62
Step by Step Solution
- Step 1: Write the proportion equation
77,145.44 : 115,783.91 = 30,431.12 : x - Step 2: Convert to fraction form
77,145.44/115,783.91 = 30,431.12/x - Step 3: Cross multiply
77,145.44x = 115,783.91 × 30,431.12 - Step 4: Simplify right side
77,145.44x = 3,523,434,059.28 - Step 5: Solve for x
x = 3,523,434,059.28/77,145.44 - Step 6: Final answer
x = 45,672.62
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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.