Finding the Fourth Proportional to 138,404.13, 207,135.46 and 85,067.99
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Solution
The fourth proportional to 138,404.13, 207,135.46 and 85,067.99 is: 127,312.65
Step by Step Solution
- Step 1: Write the proportion equation
138,404.13 : 207,135.46 = 85,067.99 : x - Step 2: Convert to fraction form
138,404.13/207,135.46 = 85,067.99/x - Step 3: Cross multiply
138,404.13x = 207,135.46 × 85,067.99 - Step 4: Simplify right side
138,404.13x = 17,620,597,087.34 - Step 5: Solve for x
x = 17,620,597,087.34/138,404.13 - Step 6: Final answer
x = 127,312.65
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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.