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Finding the Fourth Proportional to 261,293.35, 391,978.99 and 92,799.52

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Solution

The fourth proportional to 261,293.35, 391,978.99 and 92,799.52 is: 139,213.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,293.35 : 391,978.99 = 92,799.52 : x
  2. Step 2: Convert to fraction form
    261,293.35/391,978.99 = 92,799.52/x
  3. Step 3: Cross multiply
    261,293.35x = 391,978.99 × 92,799.52
  4. Step 4: Simplify right side
    261,293.35x = 36,375,463,202.02
  5. Step 5: Solve for x
    x = 36,375,463,202.02/261,293.35
  6. Step 6: Final answer
    x = 139,213.12

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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.