Finding the Fourth Proportional to 113,117.21, 155,997.46 and 76,872.75
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Solution
The fourth proportional to 113,117.21, 155,997.46 and 76,872.75 is: 106,013.52
Step by Step Solution
- Step 1: Write the proportion equation
113,117.21 : 155,997.46 = 76,872.75 : x - Step 2: Convert to fraction form
113,117.21/155,997.46 = 76,872.75/x - Step 3: Cross multiply
113,117.21x = 155,997.46 × 76,872.75 - Step 4: Simplify right side
113,117.21x = 11,991,953,254.32 - Step 5: Solve for x
x = 11,991,953,254.32/113,117.21 - Step 6: Final answer
x = 106,013.52
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.