Finding the Fourth Proportional to 87,257.28, 120,415.68 and 47,513.28
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Solution
The fourth proportional to 87,257.28, 120,415.68 and 47,513.28 is: 65,568.67
Step by Step Solution
- Step 1: Write the proportion equation
87,257.28 : 120,415.68 = 47,513.28 : x - Step 2: Convert to fraction form
87,257.28/120,415.68 = 47,513.28/x - Step 3: Cross multiply
87,257.28x = 120,415.68 × 47,513.28 - Step 4: Simplify right side
87,257.28x = 5,721,343,920.23 - Step 5: Solve for x
x = 5,721,343,920.23/87,257.28 - Step 6: Final answer
x = 65,568.67
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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.