Finding the Fourth Proportional to 115,078.56, 158,785.68 and 72,695.20
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Solution
The fourth proportional to 115,078.56, 158,785.68 and 72,695.20 is: 100,305.02
Step by Step Solution
- Step 1: Write the proportion equation
115,078.56 : 158,785.68 = 72,695.20 : x - Step 2: Convert to fraction form
115,078.56/158,785.68 = 72,695.20/x - Step 3: Cross multiply
115,078.56x = 158,785.68 × 72,695.20 - Step 4: Simplify right side
115,078.56x = 11,542,956,764.74 - Step 5: Solve for x
x = 11,542,956,764.74/115,078.56 - Step 6: Final answer
x = 100,305.02
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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.