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Finding the Fourth Proportional to 139,787.82, 192,909.39 and 76,125.54

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Solution

The fourth proportional to 139,787.82, 192,909.39 and 76,125.54 is: 105,054.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,787.82 : 192,909.39 = 76,125.54 : x
  2. Step 2: Convert to fraction form
    139,787.82/192,909.39 = 76,125.54/x
  3. Step 3: Cross multiply
    139,787.82x = 192,909.39 × 76,125.54
  4. Step 4: Simplify right side
    139,787.82x = 14,685,331,484.82
  5. Step 5: Solve for x
    x = 14,685,331,484.82/139,787.82
  6. Step 6: Final answer
    x = 105,054.44

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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.