Finding the Fourth Proportional to 138,728.70, 207,801.45 and 115,400.70
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Solution
The fourth proportional to 138,728.70, 207,801.45 and 115,400.70 is: 172,858.48
Step by Step Solution
- Step 1: Write the proportion equation
138,728.70 : 207,801.45 = 115,400.70 : x - Step 2: Convert to fraction form
138,728.70/207,801.45 = 115,400.70/x - Step 3: Cross multiply
138,728.70x = 207,801.45 × 115,400.70 - Step 4: Simplify right side
138,728.70x = 23,980,432,791.02 - Step 5: Solve for x
x = 23,980,432,791.02/138,728.70 - Step 6: Final answer
x = 172,858.48
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1.5x scale
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.