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Finding the Fourth Proportional to 139,679.97, 192,754.67 and 76,016.40

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Solution

The fourth proportional to 139,679.97, 192,754.67 and 76,016.40 is: 104,900.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,679.97 : 192,754.67 = 76,016.40 : x
  2. Step 2: Convert to fraction form
    139,679.97/192,754.67 = 76,016.40/x
  3. Step 3: Cross multiply
    139,679.97x = 192,754.67 × 76,016.40
  4. Step 4: Simplify right side
    139,679.97x = 14,652,515,716.51
  5. Step 5: Solve for x
    x = 14,652,515,716.51/139,679.97
  6. Step 6: Final answer
    x = 104,900.62

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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.