Finding the Fourth Proportional to 106,961.78, 147,622.70 and 61,631.08
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Solution
The fourth proportional to 106,961.78, 147,622.70 and 61,631.08 is: 85,059.78
Step by Step Solution
- Step 1: Write the proportion equation
106,961.78 : 147,622.70 = 61,631.08 : x - Step 2: Convert to fraction form
106,961.78/147,622.70 = 61,631.08/x - Step 3: Cross multiply
106,961.78x = 147,622.70 × 61,631.08 - Step 4: Simplify right side
106,961.78x = 9,098,146,218.54 - Step 5: Solve for x
x = 9,098,146,218.54/106,961.78 - Step 6: Final answer
x = 85,059.78
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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.