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Finding the Fourth Proportional to 90,337, 124,665.06 and 55,009

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Solution

The fourth proportional to 90,337, 124,665.06 and 55,009 is: 75,912.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,337 : 124,665.06 = 55,009 : x
  2. Step 2: Convert to fraction form
    90,337/124,665.06 = 55,009/x
  3. Step 3: Cross multiply
    90,337x = 124,665.06 × 55,009
  4. Step 4: Simplify right side
    90,337x = 6,857,700,285.54
  5. Step 5: Solve for x
    x = 6,857,700,285.54/90,337
  6. Step 6: Final answer
    x = 75,912.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.