Finding the Fourth Proportional to 87,138.63, 120,291.12 and 66,988.44
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Solution
The fourth proportional to 87,138.63, 120,291.12 and 66,988.44 is: 92,474.65
Step by Step Solution
- Step 1: Write the proportion equation
87,138.63 : 120,291.12 = 66,988.44 : x - Step 2: Convert to fraction form
87,138.63/120,291.12 = 66,988.44/x - Step 3: Cross multiply
87,138.63x = 120,291.12 × 66,988.44 - Step 4: Simplify right side
87,138.63x = 8,058,114,474.65 - Step 5: Solve for x
x = 8,058,114,474.65/87,138.63 - Step 6: Final answer
x = 92,474.65
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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.