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Finding the Fourth Proportional to 261,801.60, 392,738.85 and 112,040.70

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Solution

The fourth proportional to 261,801.60, 392,738.85 and 112,040.70 is: 168,076.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,801.60 : 392,738.85 = 112,040.70 : x
  2. Step 2: Convert to fraction form
    261,801.60/392,738.85 = 112,040.70/x
  3. Step 3: Cross multiply
    261,801.60x = 392,738.85 × 112,040.70
  4. Step 4: Simplify right side
    261,801.60x = 44,002,735,671.20
  5. Step 5: Solve for x
    x = 44,002,735,671.20/261,801.60
  6. Step 6: Final answer
    x = 168,076.65

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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.