Finding the Fourth Proportional to 138,621.80, 207,932.70 and 129,873.80
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Solution
The fourth proportional to 138,621.80, 207,932.70 and 129,873.80 is: 194,810.70
Step by Step Solution
- Step 1: Write the proportion equation
138,621.80 : 207,932.70 = 129,873.80 : x - Step 2: Convert to fraction form
138,621.80/207,932.70 = 129,873.80/x - Step 3: Cross multiply
138,621.80x = 207,932.70 × 129,873.80 - Step 4: Simplify right side
138,621.80x = 27,005,009,893.26 - Step 5: Solve for x
x = 27,005,009,893.26/138,621.80 - Step 6: Final answer
x = 194,810.70
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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.