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Finding the Fourth Proportional to 128,984.88, 193,360.64 and 45,859.44

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Solution

The fourth proportional to 128,984.88, 193,360.64 and 45,859.44 is: 68,747.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,984.88 : 193,360.64 = 45,859.44 : x
  2. Step 2: Convert to fraction form
    128,984.88/193,360.64 = 45,859.44/x
  3. Step 3: Cross multiply
    128,984.88x = 193,360.64 × 45,859.44
  4. Step 4: Simplify right side
    128,984.88x = 8,867,410,668.44
  5. Step 5: Solve for x
    x = 8,867,410,668.44/128,984.88
  6. Step 6: Final answer
    x = 68,747.68

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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.