Finding the Fourth Proportional to 120,509.36, 166,216.56 and 79,626.13
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Solution
The fourth proportional to 120,509.36, 166,216.56 and 79,626.13 is: 109,826.99
Step by Step Solution
- Step 1: Write the proportion equation
120,509.36 : 166,216.56 = 79,626.13 : x - Step 2: Convert to fraction form
120,509.36/166,216.56 = 79,626.13/x - Step 3: Cross multiply
120,509.36x = 166,216.56 × 79,626.13 - Step 4: Simplify right side
120,509.36x = 13,235,180,700.57 - Step 5: Solve for x
x = 13,235,180,700.57/120,509.36 - Step 6: Final answer
x = 109,826.99
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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.