Finding the Fourth Proportional to 81,680.24, 122,257.80 and 42,183.44
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Solution
The fourth proportional to 81,680.24, 122,257.80 and 42,183.44 is: 63,139.56
Step by Step Solution
- Step 1: Write the proportion equation
81,680.24 : 122,257.80 = 42,183.44 : x - Step 2: Convert to fraction form
81,680.24/122,257.80 = 42,183.44/x - Step 3: Cross multiply
81,680.24x = 122,257.80 × 42,183.44 - Step 4: Simplify right side
81,680.24x = 5,157,254,570.83 - Step 5: Solve for x
x = 5,157,254,570.83/81,680.24 - Step 6: Final answer
x = 63,139.56
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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.