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Finding the Fourth Proportional to 139,747.78, 192,852.84 and 76,086.28

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Solution

The fourth proportional to 139,747.78, 192,852.84 and 76,086.28 is: 104,999.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,747.78 : 192,852.84 = 76,086.28 : x
  2. Step 2: Convert to fraction form
    139,747.78/192,852.84 = 76,086.28/x
  3. Step 3: Cross multiply
    139,747.78x = 192,852.84 × 76,086.28
  4. Step 4: Simplify right side
    139,747.78x = 14,673,455,183.04
  5. Step 5: Solve for x
    x = 14,673,455,183.04/139,747.78
  6. Step 6: Final answer
    x = 104,999.56

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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.