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Finding the Fourth Proportional to 39,900.80, 55,059.36 and 23,132

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Solution

The fourth proportional to 39,900.80, 55,059.36 and 23,132 is: 31,919.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,900.80 : 55,059.36 = 23,132 : x
  2. Step 2: Convert to fraction form
    39,900.80/55,059.36 = 23,132/x
  3. Step 3: Cross multiply
    39,900.80x = 55,059.36 × 23,132
  4. Step 4: Simplify right side
    39,900.80x = 1,273,633,115.52
  5. Step 5: Solve for x
    x = 1,273,633,115.52/39,900.80
  6. Step 6: Final answer
    x = 31,919.99

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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.