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Finding the Fourth Proportional to 139,738.74, 192,840.28 and 76,076.40

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Solution

The fourth proportional to 139,738.74, 192,840.28 and 76,076.40 is: 104,985.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,738.74 : 192,840.28 = 76,076.40 : x
  2. Step 2: Convert to fraction form
    139,738.74/192,840.28 = 76,076.40/x
  3. Step 3: Cross multiply
    139,738.74x = 192,840.28 × 76,076.40
  4. Step 4: Simplify right side
    139,738.74x = 14,670,594,277.39
  5. Step 5: Solve for x
    x = 14,670,594,277.39/139,738.74
  6. Step 6: Final answer
    x = 104,985.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.