Finding the Fourth Proportional to 129,076.80, 193,615.20 and 115,298.70
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Solution
The fourth proportional to 129,076.80, 193,615.20 and 115,298.70 is: 172,948.05
Step by Step Solution
- Step 1: Write the proportion equation
129,076.80 : 193,615.20 = 115,298.70 : x - Step 2: Convert to fraction form
129,076.80/193,615.20 = 115,298.70/x - Step 3: Cross multiply
129,076.80x = 193,615.20 × 115,298.70 - Step 4: Simplify right side
129,076.80x = 22,323,580,860.24 - Step 5: Solve for x
x = 22,323,580,860.24/129,076.80 - Step 6: Final answer
x = 172,948.05
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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.