Finding the Fourth Proportional to 120,399.84, 180,427.68 and 67,698.72
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Solution
The fourth proportional to 120,399.84, 180,427.68 and 67,698.72 is: 101,451.32
Step by Step Solution
- Step 1: Write the proportion equation
120,399.84 : 180,427.68 = 67,698.72 : x - Step 2: Convert to fraction form
120,399.84/180,427.68 = 67,698.72/x - Step 3: Cross multiply
120,399.84x = 180,427.68 × 67,698.72 - Step 4: Simplify right side
120,399.84x = 12,214,722,988.57 - Step 5: Solve for x
x = 12,214,722,988.57/120,399.84 - Step 6: Final answer
x = 101,451.32
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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.