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Finding the Fourth Proportional to 78,744.21, 117,984.82 and 55,328.73

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Solution

The fourth proportional to 78,744.21, 117,984.82 and 55,328.73 is: 82,900.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,744.21 : 117,984.82 = 55,328.73 : x
  2. Step 2: Convert to fraction form
    78,744.21/117,984.82 = 55,328.73/x
  3. Step 3: Cross multiply
    78,744.21x = 117,984.82 × 55,328.73
  4. Step 4: Simplify right side
    78,744.21x = 6,527,950,249.88
  5. Step 5: Solve for x
    x = 6,527,950,249.88/78,744.21
  6. Step 6: Final answer
    x = 82,900.70

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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.