Finding the Fourth Proportional to 115,790.16, 159,739.69 and 68,021.96
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Solution
The fourth proportional to 115,790.16, 159,739.69 and 68,021.96 is: 93,840.50
Step by Step Solution
- Step 1: Write the proportion equation
115,790.16 : 159,739.69 = 68,021.96 : x - Step 2: Convert to fraction form
115,790.16/159,739.69 = 68,021.96/x - Step 3: Cross multiply
115,790.16x = 159,739.69 × 68,021.96 - Step 4: Simplify right side
115,790.16x = 10,865,806,803.59 - Step 5: Solve for x
x = 10,865,806,803.59/115,790.16 - Step 6: Final answer
x = 93,840.50
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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.