Finding the Fourth Proportional to 138,090.64, 191,286.68 and 135,291.28
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Solution
The fourth proportional to 138,090.64, 191,286.68 and 135,291.28 is: 187,408.94
Step by Step Solution
- Step 1: Write the proportion equation
138,090.64 : 191,286.68 = 135,291.28 : x - Step 2: Convert to fraction form
138,090.64/191,286.68 = 135,291.28/x - Step 3: Cross multiply
138,090.64x = 191,286.68 × 135,291.28 - Step 4: Simplify right side
138,090.64x = 25,879,419,784.15 - Step 5: Solve for x
x = 25,879,419,784.15/138,090.64 - Step 6: Final answer
x = 187,408.94
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.