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Finding the Fourth Proportional to 139,676.82, 192,753.45 and 76,014.60

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Solution

The fourth proportional to 139,676.82, 192,753.45 and 76,014.60 is: 104,899.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,676.82 : 192,753.45 = 76,014.60 : x
  2. Step 2: Convert to fraction form
    139,676.82/192,753.45 = 76,014.60/x
  3. Step 3: Cross multiply
    139,676.82x = 192,753.45 × 76,014.60
  4. Step 4: Simplify right side
    139,676.82x = 14,652,076,400.37
  5. Step 5: Solve for x
    x = 14,652,076,400.37/139,676.82
  6. Step 6: Final answer
    x = 104,899.84

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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.