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Finding the Fourth Proportional to 273,078.60, 409,617.90 and 76,086.60

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Solution

The fourth proportional to 273,078.60, 409,617.90 and 76,086.60 is: 114,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,078.60 : 409,617.90 = 76,086.60 : x
  2. Step 2: Convert to fraction form
    273,078.60/409,617.90 = 76,086.60/x
  3. Step 3: Cross multiply
    273,078.60x = 409,617.90 × 76,086.60
  4. Step 4: Simplify right side
    273,078.60x = 31,166,433,310.14
  5. Step 5: Solve for x
    x = 31,166,433,310.14/273,078.60
  6. Step 6: Final answer
    x = 114,129.90

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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.