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Finding the Fourth Proportional to 323,987.20, 485,977.92 and 87,310.24

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Solution

The fourth proportional to 323,987.20, 485,977.92 and 87,310.24 is: 130,964.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,987.20 : 485,977.92 = 87,310.24 : x
  2. Step 2: Convert to fraction form
    323,987.20/485,977.92 = 87,310.24/x
  3. Step 3: Cross multiply
    323,987.20x = 485,977.92 × 87,310.24
  4. Step 4: Simplify right side
    323,987.20x = 42,430,848,829.90
  5. Step 5: Solve for x
    x = 42,430,848,829.90/323,987.20
  6. Step 6: Final answer
    x = 130,964.58

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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.