Finding the Fourth Proportional to 138,025.31, 190,473.11 and 76,771.09
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Solution
The fourth proportional to 138,025.31, 190,473.11 and 76,771.09 is: 105,943.09
Step by Step Solution
- Step 1: Write the proportion equation
138,025.31 : 190,473.11 = 76,771.09 : x - Step 2: Convert to fraction form
138,025.31/190,473.11 = 76,771.09/x - Step 3: Cross multiply
138,025.31x = 190,473.11 × 76,771.09 - Step 4: Simplify right side
138,025.31x = 14,622,827,698.24 - Step 5: Solve for x
x = 14,622,827,698.24/138,025.31 - Step 6: Final answer
x = 105,943.09
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1.5x scale
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.