Finding the Fourth Proportional to 128,249.13, 176,983.80 and 71,660.50
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Solution
The fourth proportional to 128,249.13, 176,983.80 and 71,660.50 is: 98,891.49
Step by Step Solution
- Step 1: Write the proportion equation
128,249.13 : 176,983.80 = 71,660.50 : x - Step 2: Convert to fraction form
128,249.13/176,983.80 = 71,660.50/x - Step 3: Cross multiply
128,249.13x = 176,983.80 × 71,660.50 - Step 4: Simplify right side
128,249.13x = 12,682,747,599.90 - Step 5: Solve for x
x = 12,682,747,599.90/128,249.13 - Step 6: Final answer
x = 98,891.49
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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.