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Finding the Fourth Proportional to 77,468.97, 106,917.91 and 43,479.48

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Solution

The fourth proportional to 77,468.97, 106,917.91 and 43,479.48 is: 60,007.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,468.97 : 106,917.91 = 43,479.48 : x
  2. Step 2: Convert to fraction form
    77,468.97/106,917.91 = 43,479.48/x
  3. Step 3: Cross multiply
    77,468.97x = 106,917.91 × 43,479.48
  4. Step 4: Simplify right side
    77,468.97x = 4,648,735,421.73
  5. Step 5: Solve for x
    x = 4,648,735,421.73/77,468.97
  6. Step 6: Final answer
    x = 60,007.71

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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.