Finding the Fourth Proportional to 102,729.44, 141,671.76 and 78,857.12
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Solution
The fourth proportional to 102,729.44, 141,671.76 and 78,857.12 is: 108,750.00
Step by Step Solution
- Step 1: Write the proportion equation
102,729.44 : 141,671.76 = 78,857.12 : x - Step 2: Convert to fraction form
102,729.44/141,671.76 = 78,857.12/x - Step 3: Cross multiply
102,729.44x = 141,671.76 × 78,857.12 - Step 4: Simplify right side
102,729.44x = 11,171,826,978.93 - Step 5: Solve for x
x = 11,171,826,978.93/102,729.44 - Step 6: Final answer
x = 108,750.00
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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.