Finding the Fourth Proportional to 138,608.70, 207,621.45 and 115,280.70
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Solution
The fourth proportional to 138,608.70, 207,621.45 and 115,280.70 is: 172,678.53
Step by Step Solution
- Step 1: Write the proportion equation
138,608.70 : 207,621.45 = 115,280.70 : x - Step 2: Convert to fraction form
138,608.70/207,621.45 = 115,280.70/x - Step 3: Cross multiply
138,608.70x = 207,621.45 × 115,280.70 - Step 4: Simplify right side
138,608.70x = 23,934,746,091.02 - Step 5: Solve for x
x = 23,934,746,091.02/138,608.70 - Step 6: Final answer
x = 172,678.53
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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.