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Finding the Fourth Proportional to 139,883.28, 193,033.44 and 76,219.44

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Solution

The fourth proportional to 139,883.28, 193,033.44 and 76,219.44 is: 105,179.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,883.28 : 193,033.44 = 76,219.44 : x
  2. Step 2: Convert to fraction form
    139,883.28/193,033.44 = 76,219.44/x
  3. Step 3: Cross multiply
    139,883.28x = 193,033.44 × 76,219.44
  4. Step 4: Simplify right side
    139,883.28x = 14,712,900,698.07
  5. Step 5: Solve for x
    x = 14,712,900,698.07/139,883.28
  6. Step 6: Final answer
    x = 105,179.84

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1.5x scale

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.