Finding the Fourth Proportional to 87,708.21, 121,037.09 and 47,421.69
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Solution
The fourth proportional to 87,708.21, 121,037.09 and 47,421.69 is: 65,441.80
Step by Step Solution
- Step 1: Write the proportion equation
87,708.21 : 121,037.09 = 47,421.69 : x - Step 2: Convert to fraction form
87,708.21/121,037.09 = 47,421.69/x - Step 3: Cross multiply
87,708.21x = 121,037.09 × 47,421.69 - Step 4: Simplify right side
87,708.21x = 5,739,783,123.37 - Step 5: Solve for x
x = 5,739,783,123.37/87,708.21 - Step 6: Final answer
x = 65,441.80
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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.