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Finding the Fourth Proportional to 138,704.18, 208,079.60 and 43,960.77

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Solution

The fourth proportional to 138,704.18, 208,079.60 and 43,960.77 is: 65,948.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,704.18 : 208,079.60 = 43,960.77 : x
  2. Step 2: Convert to fraction form
    138,704.18/208,079.60 = 43,960.77/x
  3. Step 3: Cross multiply
    138,704.18x = 208,079.60 × 43,960.77
  4. Step 4: Simplify right side
    138,704.18x = 9,147,339,217.49
  5. Step 5: Solve for x
    x = 9,147,339,217.49/138,704.18
  6. Step 6: Final answer
    x = 65,948.55

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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.