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Finding the Fourth Proportional to 139,702.44, 192,789.18 and 76,040.04

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Solution

The fourth proportional to 139,702.44, 192,789.18 and 76,040.04 is: 104,935.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,702.44 : 192,789.18 = 76,040.04 : x
  2. Step 2: Convert to fraction form
    139,702.44/192,789.18 = 76,040.04/x
  3. Step 3: Cross multiply
    139,702.44x = 192,789.18 × 76,040.04
  4. Step 4: Simplify right side
    139,702.44x = 14,659,696,958.77
  5. Step 5: Solve for x
    x = 14,659,696,958.77/139,702.44
  6. Step 6: Final answer
    x = 104,935.15

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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.