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Finding the Fourth Proportional to 215,911.31, 323,866.49 and 58,139.91

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Solution

The fourth proportional to 215,911.31, 323,866.49 and 58,139.91 is: 87,209.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,911.31 : 323,866.49 = 58,139.91 : x
  2. Step 2: Convert to fraction form
    215,911.31/323,866.49 = 58,139.91/x
  3. Step 3: Cross multiply
    215,911.31x = 323,866.49 × 58,139.91
  4. Step 4: Simplify right side
    215,911.31x = 18,829,568,289.92
  5. Step 5: Solve for x
    x = 18,829,568,289.92/215,911.31
  6. Step 6: Final answer
    x = 87,209.74

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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.