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Finding the Fourth Proportional to 323,576.10, 485,364.15 and 86,942.70

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Solution

The fourth proportional to 323,576.10, 485,364.15 and 86,942.70 is: 130,414.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,576.10 : 485,364.15 = 86,942.70 : x
  2. Step 2: Convert to fraction form
    323,576.10/485,364.15 = 86,942.70/x
  3. Step 3: Cross multiply
    323,576.10x = 485,364.15 × 86,942.70
  4. Step 4: Simplify right side
    323,576.10x = 42,198,869,684.21
  5. Step 5: Solve for x
    x = 42,198,869,684.21/323,576.10
  6. Step 6: Final answer
    x = 130,414.05

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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.