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Finding the Fourth Proportional to 139,677.56, 192,755.04 and 76,013.96

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Solution

The fourth proportional to 139,677.56, 192,755.04 and 76,013.96 is: 104,899.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,677.56 : 192,755.04 = 76,013.96 : x
  2. Step 2: Convert to fraction form
    139,677.56/192,755.04 = 76,013.96/x
  3. Step 3: Cross multiply
    139,677.56x = 192,755.04 × 76,013.96
  4. Step 4: Simplify right side
    139,677.56x = 14,652,073,900.36
  5. Step 5: Solve for x
    x = 14,652,073,900.36/139,677.56
  6. Step 6: Final answer
    x = 104,899.27

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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.