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Finding the Fourth Proportional to 92,911.37, 128,217.78 and 50,469.90

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Solution

The fourth proportional to 92,911.37, 128,217.78 and 50,469.90 is: 69,648.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,911.37 : 128,217.78 = 50,469.90 : x
  2. Step 2: Convert to fraction form
    92,911.37/128,217.78 = 50,469.90/x
  3. Step 3: Cross multiply
    92,911.37x = 128,217.78 × 50,469.90
  4. Step 4: Simplify right side
    92,911.37x = 6,471,138,534.82
  5. Step 5: Solve for x
    x = 6,471,138,534.82/92,911.37
  6. Step 6: Final answer
    x = 69,648.51

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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.