Finding the Fourth Proportional to 149,120.56, 205,783.32 and 81,138.88
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Solution
The fourth proportional to 149,120.56, 205,783.32 and 81,138.88 is: 111,969.99
Step by Step Solution
- Step 1: Write the proportion equation
149,120.56 : 205,783.32 = 81,138.88 : x - Step 2: Convert to fraction form
149,120.56/205,783.32 = 81,138.88/x - Step 3: Cross multiply
149,120.56x = 205,783.32 × 81,138.88 - Step 4: Simplify right side
149,120.56x = 16,697,028,107.48 - Step 5: Solve for x
x = 16,697,028,107.48/149,120.56 - Step 6: Final answer
x = 111,969.99
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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.