Finding the Fourth Proportional to 259,472.68, 389,206.68 and 81,979.68
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Solution
The fourth proportional to 259,472.68, 389,206.68 and 81,979.68 is: 122,968.78
Step by Step Solution
- Step 1: Write the proportion equation
259,472.68 : 389,206.68 = 81,979.68 : x - Step 2: Convert to fraction form
259,472.68/389,206.68 = 81,979.68/x - Step 3: Cross multiply
259,472.68x = 389,206.68 × 81,979.68 - Step 4: Simplify right side
259,472.68x = 31,907,039,080.26 - Step 5: Solve for x
x = 31,907,039,080.26/259,472.68 - Step 6: Final answer
x = 122,968.78
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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.