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Finding the Fourth Proportional to 139,907.98, 193,067.36 and 76,244.41

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Solution

The fourth proportional to 139,907.98, 193,067.36 and 76,244.41 is: 105,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,907.98 : 193,067.36 = 76,244.41 : x
  2. Step 2: Convert to fraction form
    139,907.98/193,067.36 = 76,244.41/x
  3. Step 3: Cross multiply
    139,907.98x = 193,067.36 × 76,244.41
  4. Step 4: Simplify right side
    139,907.98x = 14,720,305,606.90
  5. Step 5: Solve for x
    x = 14,720,305,606.90/139,907.98
  6. Step 6: Final answer
    x = 105,214.20

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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.