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Finding the Fourth Proportional to 138,601.70, 207,928.20 and 43,855.74

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Solution

The fourth proportional to 138,601.70, 207,928.20 and 43,855.74 is: 65,791.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,601.70 : 207,928.20 = 43,855.74 : x
  2. Step 2: Convert to fraction form
    138,601.70/207,928.20 = 43,855.74/x
  3. Step 3: Cross multiply
    138,601.70x = 207,928.20 × 43,855.74
  4. Step 4: Simplify right side
    138,601.70x = 9,118,845,077.87
  5. Step 5: Solve for x
    x = 9,118,845,077.87/138,601.70
  6. Step 6: Final answer
    x = 65,791.73

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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.