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Finding the Fourth Proportional to 139,299.40, 208,900.12 and 50,537.80

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Solution

The fourth proportional to 139,299.40, 208,900.12 and 50,537.80 is: 75,788.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,299.40 : 208,900.12 = 50,537.80 : x
  2. Step 2: Convert to fraction form
    139,299.40/208,900.12 = 50,537.80/x
  3. Step 3: Cross multiply
    139,299.40x = 208,900.12 × 50,537.80
  4. Step 4: Simplify right side
    139,299.40x = 10,557,352,484.54
  5. Step 5: Solve for x
    x = 10,557,352,484.54/139,299.40
  6. Step 6: Final answer
    x = 75,788.93

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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.