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Finding the Fourth Proportional to 128,286.91, 192,260.76 and 92,866.60

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Solution

The fourth proportional to 128,286.91, 192,260.76 and 92,866.60 is: 139,177.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,286.91 : 192,260.76 = 92,866.60 : x
  2. Step 2: Convert to fraction form
    128,286.91/192,260.76 = 92,866.60/x
  3. Step 3: Cross multiply
    128,286.91x = 192,260.76 × 92,866.60
  4. Step 4: Simplify right side
    128,286.91x = 17,854,603,094.62
  5. Step 5: Solve for x
    x = 17,854,603,094.62/128,286.91
  6. Step 6: Final answer
    x = 139,177.12

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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.