Finding the Fourth Proportional to 138,744.99, 207,782.13 and 79,400.75
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Solution
The fourth proportional to 138,744.99, 207,782.13 and 79,400.75 is: 118,909.20
Step by Step Solution
- Step 1: Write the proportion equation
138,744.99 : 207,782.13 = 79,400.75 : x - Step 2: Convert to fraction form
138,744.99/207,782.13 = 79,400.75/x - Step 3: Cross multiply
138,744.99x = 207,782.13 × 79,400.75 - Step 4: Simplify right side
138,744.99x = 16,498,055,919.69 - Step 5: Solve for x
x = 16,498,055,919.69/138,744.99 - Step 6: Final answer
x = 118,909.20
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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.