Finding the Fourth Proportional to 99,984.20, 137,982.36 and 57,542.84
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Solution
The fourth proportional to 99,984.20, 137,982.36 and 57,542.84 is: 79,411.52
Step by Step Solution
- Step 1: Write the proportion equation
99,984.20 : 137,982.36 = 57,542.84 : x - Step 2: Convert to fraction form
99,984.20/137,982.36 = 57,542.84/x - Step 3: Cross multiply
99,984.20x = 137,982.36 × 57,542.84 - Step 4: Simplify right side
99,984.20x = 7,939,896,864.30 - Step 5: Solve for x
x = 7,939,896,864.30/99,984.20 - Step 6: Final answer
x = 79,411.52
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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.