Finding the Fourth Proportional to 87,187.97, 120,288.42 and 56,990.70
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Solution
The fourth proportional to 87,187.97, 120,288.42 and 56,990.70 is: 78,626.92
Step by Step Solution
- Step 1: Write the proportion equation
87,187.97 : 120,288.42 = 56,990.70 : x - Step 2: Convert to fraction form
87,187.97/120,288.42 = 56,990.70/x - Step 3: Cross multiply
87,187.97x = 120,288.42 × 56,990.70 - Step 4: Simplify right side
87,187.97x = 6,855,321,257.69 - Step 5: Solve for x
x = 6,855,321,257.69/87,187.97 - Step 6: Final answer
x = 78,626.92
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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.