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Finding the Fourth Proportional to 101,178.44, 139,630.76 and 58,171.88

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Solution

The fourth proportional to 101,178.44, 139,630.76 and 58,171.88 is: 80,279.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,178.44 : 139,630.76 = 58,171.88 : x
  2. Step 2: Convert to fraction form
    101,178.44/139,630.76 = 58,171.88/x
  3. Step 3: Cross multiply
    101,178.44x = 139,630.76 × 58,171.88
  4. Step 4: Simplify right side
    101,178.44x = 8,122,583,815.03
  5. Step 5: Solve for x
    x = 8,122,583,815.03/101,178.44
  6. Step 6: Final answer
    x = 80,279.79

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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.