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Finding the Fourth Proportional to 51,104.20, 76,659.90 and 28,928.20

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Solution

The fourth proportional to 51,104.20, 76,659.90 and 28,928.20 is: 43,394.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,104.20 : 76,659.90 = 28,928.20 : x
  2. Step 2: Convert to fraction form
    51,104.20/76,659.90 = 28,928.20/x
  3. Step 3: Cross multiply
    51,104.20x = 76,659.90 × 28,928.20
  4. Step 4: Simplify right side
    51,104.20x = 2,217,632,919.18
  5. Step 5: Solve for x
    x = 2,217,632,919.18/51,104.20
  6. Step 6: Final answer
    x = 43,394.34

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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.