Finding the Fourth Proportional to 138,620.60, 207,930.90 and 135,855.80
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Solution
The fourth proportional to 138,620.60, 207,930.90 and 135,855.80 is: 203,783.70
Step by Step Solution
- Step 1: Write the proportion equation
138,620.60 : 207,930.90 = 135,855.80 : x - Step 2: Convert to fraction form
138,620.60/207,930.90 = 135,855.80/x - Step 3: Cross multiply
138,620.60x = 207,930.90 × 135,855.80 - Step 4: Simplify right side
138,620.60x = 28,248,618,764.22 - Step 5: Solve for x
x = 28,248,618,764.22/138,620.60 - Step 6: Final answer
x = 203,783.70
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1.5x scale
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.