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Finding the Fourth Proportional to 215,807.20, 323,804.10 and 115,850.68

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Solution

The fourth proportional to 215,807.20, 323,804.10 and 115,850.68 is: 173,826.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,807.20 : 323,804.10 = 115,850.68 : x
  2. Step 2: Convert to fraction form
    215,807.20/323,804.10 = 115,850.68/x
  3. Step 3: Cross multiply
    215,807.20x = 323,804.10 × 115,850.68
  4. Step 4: Simplify right side
    215,807.20x = 37,512,924,796.72
  5. Step 5: Solve for x
    x = 37,512,924,796.72/215,807.20
  6. Step 6: Final answer
    x = 173,826.11

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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.