Finding the Fourth Proportional to 115,838.64, 159,754.68 and 78,163.92
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Solution
The fourth proportional to 115,838.64, 159,754.68 and 78,163.92 is: 107,796.95
Step by Step Solution
- Step 1: Write the proportion equation
115,838.64 : 159,754.68 = 78,163.92 : x - Step 2: Convert to fraction form
115,838.64/159,754.68 = 78,163.92/x - Step 3: Cross multiply
115,838.64x = 159,754.68 × 78,163.92 - Step 4: Simplify right side
115,838.64x = 12,487,052,027.15 - Step 5: Solve for x
x = 12,487,052,027.15/115,838.64 - Step 6: Final answer
x = 107,796.95
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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.