Finding the Fourth Proportional to 87,765.41, 121,115.76 and 47,479.05
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Solution
The fourth proportional to 87,765.41, 121,115.76 and 47,479.05 is: 65,520.82
Step by Step Solution
- Step 1: Write the proportion equation
87,765.41 : 121,115.76 = 47,479.05 : x - Step 2: Convert to fraction form
87,765.41/121,115.76 = 47,479.05/x - Step 3: Cross multiply
87,765.41x = 121,115.76 × 47,479.05 - Step 4: Simplify right side
87,765.41x = 5,750,461,224.83 - Step 5: Solve for x
x = 5,750,461,224.83/87,765.41 - Step 6: Final answer
x = 65,520.82
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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.