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Finding the Fourth Proportional to 139,930.38, 209,894.58 and 40,090.95

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Solution

The fourth proportional to 139,930.38, 209,894.58 and 40,090.95 is: 60,136.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,930.38 : 209,894.58 = 40,090.95 : x
  2. Step 2: Convert to fraction form
    139,930.38/209,894.58 = 40,090.95/x
  3. Step 3: Cross multiply
    139,930.38x = 209,894.58 × 40,090.95
  4. Step 4: Simplify right side
    139,930.38x = 8,414,873,112.05
  5. Step 5: Solve for x
    x = 8,414,873,112.05/139,930.38
  6. Step 6: Final answer
    x = 60,136.14

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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.