Finding the Fourth Proportional to 172,979.12, 259,479.62 and 73,120.70
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Solution
The fourth proportional to 172,979.12, 259,479.62 and 73,120.70 is: 109,685.67
Step by Step Solution
- Step 1: Write the proportion equation
172,979.12 : 259,479.62 = 73,120.70 : x - Step 2: Convert to fraction form
172,979.12/259,479.62 = 73,120.70/x - Step 3: Cross multiply
172,979.12x = 259,479.62 × 73,120.70 - Step 4: Simplify right side
172,979.12x = 18,973,331,450.13 - Step 5: Solve for x
x = 18,973,331,450.13/172,979.12 - Step 6: Final answer
x = 109,685.67
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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.