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Finding the Fourth Proportional to 79,211.34, 118,843.52 and 25,905.78

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Solution

The fourth proportional to 79,211.34, 118,843.52 and 25,905.78 is: 38,867.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,211.34 : 118,843.52 = 25,905.78 : x
  2. Step 2: Convert to fraction form
    79,211.34/118,843.52 = 25,905.78/x
  3. Step 3: Cross multiply
    79,211.34x = 118,843.52 × 25,905.78
  4. Step 4: Simplify right side
    79,211.34x = 3,078,733,954.02
  5. Step 5: Solve for x
    x = 3,078,733,954.02/79,211.34
  6. Step 6: Final answer
    x = 38,867.34

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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.