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Finding the Fourth Proportional to 88,431.52, 132,693.36 and 39,172

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Solution

The fourth proportional to 88,431.52, 132,693.36 and 39,172 is: 58,778.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,431.52 : 132,693.36 = 39,172 : x
  2. Step 2: Convert to fraction form
    88,431.52/132,693.36 = 39,172/x
  3. Step 3: Cross multiply
    88,431.52x = 132,693.36 × 39,172
  4. Step 4: Simplify right side
    88,431.52x = 5,197,864,297.92
  5. Step 5: Solve for x
    x = 5,197,864,297.92/88,431.52
  6. Step 6: Final answer
    x = 58,778.41

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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.