Finding the Fourth Proportional to 81,720.87, 122,765.84 and 48,462.75
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Solution
The fourth proportional to 81,720.87, 122,765.84 and 48,462.75 is: 72,803.56
Step by Step Solution
- Step 1: Write the proportion equation
81,720.87 : 122,765.84 = 48,462.75 : x - Step 2: Convert to fraction form
81,720.87/122,765.84 = 48,462.75/x - Step 3: Cross multiply
81,720.87x = 122,765.84 × 48,462.75 - Step 4: Simplify right side
81,720.87x = 5,949,570,494.90 - Step 5: Solve for x
x = 5,949,570,494.90/81,720.87 - Step 6: Final answer
x = 72,803.56
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.