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Finding the Fourth Proportional to 323,747.20, 485,620.80 and 99,107.20

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Solution

The fourth proportional to 323,747.20, 485,620.80 and 99,107.20 is: 148,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,747.20 : 485,620.80 = 99,107.20 : x
  2. Step 2: Convert to fraction form
    323,747.20/485,620.80 = 99,107.20/x
  3. Step 3: Cross multiply
    323,747.20x = 485,620.80 × 99,107.20
  4. Step 4: Simplify right side
    323,747.20x = 48,128,517,749.76
  5. Step 5: Solve for x
    x = 48,128,517,749.76/323,747.20
  6. Step 6: Final answer
    x = 148,660.80

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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.