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Finding the Fourth Proportional to 138,011.60, 206,890.68 and 44,469.20

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Solution

The fourth proportional to 138,011.60, 206,890.68 and 44,469.20 is: 66,662.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,011.60 : 206,890.68 = 44,469.20 : x
  2. Step 2: Convert to fraction form
    138,011.60/206,890.68 = 44,469.20/x
  3. Step 3: Cross multiply
    138,011.60x = 206,890.68 × 44,469.20
  4. Step 4: Simplify right side
    138,011.60x = 9,200,263,027.06
  5. Step 5: Solve for x
    x = 9,200,263,027.06/138,011.60
  6. Step 6: Final answer
    x = 66,662.97

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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.