Finding the Fourth Proportional to 138,753.21, 191,479.92 and 75,090.99
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Solution
The fourth proportional to 138,753.21, 191,479.92 and 75,090.99 is: 103,625.83
Step by Step Solution
- Step 1: Write the proportion equation
138,753.21 : 191,479.92 = 75,090.99 : x - Step 2: Convert to fraction form
138,753.21/191,479.92 = 75,090.99/x - Step 3: Cross multiply
138,753.21x = 191,479.92 × 75,090.99 - Step 4: Simplify right side
138,753.21x = 14,378,416,757.92 - Step 5: Solve for x
x = 14,378,416,757.92/138,753.21 - Step 6: Final answer
x = 103,625.83
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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.