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Finding the Fourth Proportional to 323,780.80, 485,671.20 and 102,164.80

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Solution

The fourth proportional to 323,780.80, 485,671.20 and 102,164.80 is: 153,247.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,780.80 : 485,671.20 = 102,164.80 : x
  2. Step 2: Convert to fraction form
    323,780.80/485,671.20 = 102,164.80/x
  3. Step 3: Cross multiply
    323,780.80x = 485,671.20 × 102,164.80
  4. Step 4: Simplify right side
    323,780.80x = 49,618,501,013.76
  5. Step 5: Solve for x
    x = 49,618,501,013.76/323,780.80
  6. Step 6: Final answer
    x = 153,247.20

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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.