Finding the Fourth Proportional to 128,911.28, 193,372.16 and 61,408.62
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Solution
The fourth proportional to 128,911.28, 193,372.16 and 61,408.62 is: 92,115.43
Step by Step Solution
- Step 1: Write the proportion equation
128,911.28 : 193,372.16 = 61,408.62 : x - Step 2: Convert to fraction form
128,911.28/193,372.16 = 61,408.62/x - Step 3: Cross multiply
128,911.28x = 193,372.16 × 61,408.62 - Step 4: Simplify right side
128,911.28x = 11,874,717,492.02 - Step 5: Solve for x
x = 11,874,717,492.02/128,911.28 - Step 6: Final answer
x = 92,115.43
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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.