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Finding the Fourth Proportional to 77,391.56, 116,087.34 and 61,907.60

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Solution

The fourth proportional to 77,391.56, 116,087.34 and 61,907.60 is: 92,861.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,391.56 : 116,087.34 = 61,907.60 : x
  2. Step 2: Convert to fraction form
    77,391.56/116,087.34 = 61,907.60/x
  3. Step 3: Cross multiply
    77,391.56x = 116,087.34 × 61,907.60
  4. Step 4: Simplify right side
    77,391.56x = 7,186,688,609.78
  5. Step 5: Solve for x
    x = 7,186,688,609.78/77,391.56
  6. Step 6: Final answer
    x = 92,861.40

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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.