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Finding the Fourth Proportional to 139,679.44, 192,757.66 and 76,017.69

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Solution

The fourth proportional to 139,679.44, 192,757.66 and 76,017.69 is: 104,904.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,679.44 : 192,757.66 = 76,017.69 : x
  2. Step 2: Convert to fraction form
    139,679.44/192,757.66 = 76,017.69/x
  3. Step 3: Cross multiply
    139,679.44x = 192,757.66 × 76,017.69
  4. Step 4: Simplify right side
    139,679.44x = 14,652,991,852.96
  5. Step 5: Solve for x
    x = 14,652,991,852.96/139,679.44
  6. Step 6: Final answer
    x = 104,904.43

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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.