Finding the Fourth Proportional to 87,137.68, 120,251.40 and 48,905.68
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Solution
The fourth proportional to 87,137.68, 120,251.40 and 48,905.68 is: 67,490.63
Step by Step Solution
- Step 1: Write the proportion equation
87,137.68 : 120,251.40 = 48,905.68 : x - Step 2: Convert to fraction form
87,137.68/120,251.40 = 48,905.68/x - Step 3: Cross multiply
87,137.68x = 120,251.40 × 48,905.68 - Step 4: Simplify right side
87,137.68x = 5,880,976,487.95 - Step 5: Solve for x
x = 5,880,976,487.95/87,137.68 - Step 6: Final answer
x = 67,490.63
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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.