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Finding the Fourth Proportional to 139,679.85, 192,754.49 and 76,016.28

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Solution

The fourth proportional to 139,679.85, 192,754.49 and 76,016.28 is: 104,900.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,679.85 : 192,754.49 = 76,016.28 : x
  2. Step 2: Convert to fraction form
    139,679.85/192,754.49 = 76,016.28/x
  3. Step 3: Cross multiply
    139,679.85x = 192,754.49 × 76,016.28
  4. Step 4: Simplify right side
    139,679.85x = 14,652,479,283.10
  5. Step 5: Solve for x
    x = 14,652,479,283.10/139,679.85
  6. Step 6: Final answer
    x = 104,900.45

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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.