Finding the Fourth Proportional to 139,278.97, 192,216.87 and 78,860.26
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Solution
The fourth proportional to 139,278.97, 192,216.87 and 78,860.26 is: 108,833.89
Step by Step Solution
- Step 1: Write the proportion equation
139,278.97 : 192,216.87 = 78,860.26 : x - Step 2: Convert to fraction form
139,278.97/192,216.87 = 78,860.26/x - Step 3: Cross multiply
139,278.97x = 192,216.87 × 78,860.26 - Step 4: Simplify right side
139,278.97x = 15,158,271,864.04 - Step 5: Solve for x
x = 15,158,271,864.04/139,278.97 - Step 6: Final answer
x = 108,833.89
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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.