Finding the Fourth Proportional to 171,989.31, 257,879.16 and 77,201.09
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Solution
The fourth proportional to 171,989.31, 257,879.16 and 77,201.09 is: 115,754.58
Step by Step Solution
- Step 1: Write the proportion equation
171,989.31 : 257,879.16 = 77,201.09 : x - Step 2: Convert to fraction form
171,989.31/257,879.16 = 77,201.09/x - Step 3: Cross multiply
171,989.31x = 257,879.16 × 77,201.09 - Step 4: Simplify right side
171,989.31x = 19,908,550,950.89 - Step 5: Solve for x
x = 19,908,550,950.89/171,989.31 - Step 6: Final answer
x = 115,754.58
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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.