Finding the Fourth Proportional to 129,321,619.20, 193,982,428.80 and 115,291,576.80
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Solution
The fourth proportional to 129,321,619.20, 193,982,428.80 and 115,291,576.80 is: 172,937,365.20
Step by Step Solution
- Step 1: Write the proportion equation
129,321,619.20 : 193,982,428.80 = 115,291,576.80 : x - Step 2: Convert to fraction form
129,321,619.20/193,982,428.80 = 115,291,576.80/x - Step 3: Cross multiply
129,321,619.20x = 193,982,428.80 × 115,291,576.80 - Step 4: Simplify right side
129,321,619.20x = 22,364,540,087,845,732 - Step 5: Solve for x
x = 22,364,540,087,845,732/129,321,619.20 - Step 6: Final answer
x = 172,937,365.20
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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.