Finding the Fourth Proportional to 138,656.30, 207,984.45 and 133,213.10
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Solution
The fourth proportional to 138,656.30, 207,984.45 and 133,213.10 is: 199,819.65
Step by Step Solution
- Step 1: Write the proportion equation
138,656.30 : 207,984.45 = 133,213.10 : x - Step 2: Convert to fraction form
138,656.30/207,984.45 = 133,213.10/x - Step 3: Cross multiply
138,656.30x = 207,984.45 × 133,213.10 - Step 4: Simplify right side
138,656.30x = 27,706,253,336.30 - Step 5: Solve for x
x = 27,706,253,336.30/138,656.30 - Step 6: Final answer
x = 199,819.65
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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.