Finding the Fourth Proportional to 129,979.20, 194,968.80 and 56,107.20
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Solution
The fourth proportional to 129,979.20, 194,968.80 and 56,107.20 is: 84,160.80
Step by Step Solution
- Step 1: Write the proportion equation
129,979.20 : 194,968.80 = 56,107.20 : x - Step 2: Convert to fraction form
129,979.20/194,968.80 = 56,107.20/x - Step 3: Cross multiply
129,979.20x = 194,968.80 × 56,107.20 - Step 4: Simplify right side
129,979.20x = 10,939,153,455.36 - Step 5: Solve for x
x = 10,939,153,455.36/129,979.20 - Step 6: Final answer
x = 84,160.80
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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.