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Finding the Fourth Proportional to 139,992.82, 209,930.00 and 76,794.90

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Solution

The fourth proportional to 139,992.82, 209,930.00 and 76,794.90 is: 115,159.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,992.82 : 209,930.00 = 76,794.90 : x
  2. Step 2: Convert to fraction form
    139,992.82/209,930.00 = 76,794.90/x
  3. Step 3: Cross multiply
    139,992.82x = 209,930.00 × 76,794.90
  4. Step 4: Simplify right side
    139,992.82x = 16,121,552,185.79
  5. Step 5: Solve for x
    x = 16,121,552,185.79/139,992.82
  6. Step 6: Final answer
    x = 115,159.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.