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Finding the Fourth Proportional to 139,676.67, 192,754.79 and 76,015.83

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Solution

The fourth proportional to 139,676.67, 192,754.79 and 76,015.83 is: 104,902.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,676.67 : 192,754.79 = 76,015.83 : x
  2. Step 2: Convert to fraction form
    139,676.67/192,754.79 = 76,015.83/x
  3. Step 3: Cross multiply
    139,676.67x = 192,754.79 × 76,015.83
  4. Step 4: Simplify right side
    139,676.67x = 14,652,415,976.14
  5. Step 5: Solve for x
    x = 14,652,415,976.14/139,676.67
  6. Step 6: Final answer
    x = 104,902.39

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1.5x scale

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.