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Finding the Fourth Proportional to 101,991.44, 140,746.20 and 56,667.44

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Solution

The fourth proportional to 101,991.44, 140,746.20 and 56,667.44 is: 78,199.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,991.44 : 140,746.20 = 56,667.44 : x
  2. Step 2: Convert to fraction form
    101,991.44/140,746.20 = 56,667.44/x
  3. Step 3: Cross multiply
    101,991.44x = 140,746.20 × 56,667.44
  4. Step 4: Simplify right side
    101,991.44x = 7,975,726,843.73
  5. Step 5: Solve for x
    x = 7,975,726,843.73/101,991.44
  6. Step 6: Final answer
    x = 78,199.96

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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.