Finding the Fourth Proportional to 156,939.80, 235,409.70 and 78,207.80
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Solution
The fourth proportional to 156,939.80, 235,409.70 and 78,207.80 is: 117,311.70
Step by Step Solution
- Step 1: Write the proportion equation
156,939.80 : 235,409.70 = 78,207.80 : x - Step 2: Convert to fraction form
156,939.80/235,409.70 = 78,207.80/x - Step 3: Cross multiply
156,939.80x = 235,409.70 × 78,207.80 - Step 4: Simplify right side
156,939.80x = 18,410,874,735.66 - Step 5: Solve for x
x = 18,410,874,735.66/156,939.80 - Step 6: Final answer
x = 117,311.70
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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.