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Finding the Fourth Proportional to 323,780.70, 485,440.65 and 124,023.90

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Solution

The fourth proportional to 323,780.70, 485,440.65 and 124,023.90 is: 185,947.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,780.70 : 485,440.65 = 124,023.90 : x
  2. Step 2: Convert to fraction form
    323,780.70/485,440.65 = 124,023.90/x
  3. Step 3: Cross multiply
    323,780.70x = 485,440.65 × 124,023.90
  4. Step 4: Simplify right side
    323,780.70x = 60,206,242,631.54
  5. Step 5: Solve for x
    x = 60,206,242,631.54/323,780.70
  6. Step 6: Final answer
    x = 185,947.60

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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.