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Finding the Fourth Proportional to 100,951.60, 139,311.33 and 55,633.78

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Solution

The fourth proportional to 100,951.60, 139,311.33 and 55,633.78 is: 76,773.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,951.60 : 139,311.33 = 55,633.78 : x
  2. Step 2: Convert to fraction form
    100,951.60/139,311.33 = 55,633.78/x
  3. Step 3: Cross multiply
    100,951.60x = 139,311.33 × 55,633.78
  4. Step 4: Simplify right side
    100,951.60x = 7,750,415,884.73
  5. Step 5: Solve for x
    x = 7,750,415,884.73/100,951.60
  6. Step 6: Final answer
    x = 76,773.58

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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.