Finding the Fourth Proportional to 138,853.99, 191,619.09 and 75,191.84
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Solution
The fourth proportional to 138,853.99, 191,619.09 and 75,191.84 is: 103,765.05
Step by Step Solution
- Step 1: Write the proportion equation
138,853.99 : 191,619.09 = 75,191.84 : x - Step 2: Convert to fraction form
138,853.99/191,619.09 = 75,191.84/x - Step 3: Cross multiply
138,853.99x = 191,619.09 × 75,191.84 - Step 4: Simplify right side
138,853.99x = 14,408,190,998.13 - Step 5: Solve for x
x = 14,408,190,998.13/138,853.99 - Step 6: Final answer
x = 103,765.05
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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.