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Finding the Fourth Proportional to 139,273.20, 192,251.88 and 93,978

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Solution

The fourth proportional to 139,273.20, 192,251.88 and 93,978 is: 129,726.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,273.20 : 192,251.88 = 93,978 : x
  2. Step 2: Convert to fraction form
    139,273.20/192,251.88 = 93,978/x
  3. Step 3: Cross multiply
    139,273.20x = 192,251.88 × 93,978
  4. Step 4: Simplify right side
    139,273.20x = 18,067,447,178.64
  5. Step 5: Solve for x
    x = 18,067,447,178.64/139,273.20
  6. Step 6: Final answer
    x = 129,726.66

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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.