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Finding the Fourth Proportional to 139,149.13, 208,753.94 and 45,651.37

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Solution

The fourth proportional to 139,149.13, 208,753.94 and 45,651.37 is: 68,486.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,149.13 : 208,753.94 = 45,651.37 : x
  2. Step 2: Convert to fraction form
    139,149.13/208,753.94 = 45,651.37/x
  3. Step 3: Cross multiply
    139,149.13x = 208,753.94 × 45,651.37
  4. Step 4: Simplify right side
    139,149.13x = 9,529,903,353.90
  5. Step 5: Solve for x
    x = 9,529,903,353.90/139,149.13
  6. Step 6: Final answer
    x = 68,486.98

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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.