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Finding the Fourth Proportional to 323,729.70, 485,364.15 and 123,972.90

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Solution

The fourth proportional to 323,729.70, 485,364.15 and 123,972.90 is: 185,871.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,729.70 : 485,364.15 = 123,972.90 : x
  2. Step 2: Convert to fraction form
    323,729.70/485,364.15 = 123,972.90/x
  3. Step 3: Cross multiply
    323,729.70x = 485,364.15 × 123,972.90
  4. Step 4: Simplify right side
    323,729.70x = 60,172,001,231.54
  5. Step 5: Solve for x
    x = 60,172,001,231.54/323,729.70
  6. Step 6: Final answer
    x = 185,871.12

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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.