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Finding the Fourth Proportional to 101,469.56, 140,067.24 and 90,840.74

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Solution

The fourth proportional to 101,469.56, 140,067.24 and 90,840.74 is: 125,395.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,469.56 : 140,067.24 = 90,840.74 : x
  2. Step 2: Convert to fraction form
    101,469.56/140,067.24 = 90,840.74/x
  3. Step 3: Cross multiply
    101,469.56x = 140,067.24 × 90,840.74
  4. Step 4: Simplify right side
    101,469.56x = 12,723,811,731.36
  5. Step 5: Solve for x
    x = 12,723,811,731.36/101,469.56
  6. Step 6: Final answer
    x = 125,395.36

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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.