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Finding the Fourth Proportional to 139,027.79, 208,401.47 and 54,755.39

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Solution

The fourth proportional to 139,027.79, 208,401.47 and 54,755.39 is: 82,077.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,027.79 : 208,401.47 = 54,755.39 : x
  2. Step 2: Convert to fraction form
    139,027.79/208,401.47 = 54,755.39/x
  3. Step 3: Cross multiply
    139,027.79x = 208,401.47 × 54,755.39
  4. Step 4: Simplify right side
    139,027.79x = 11,411,103,766.42
  5. Step 5: Solve for x
    x = 11,411,103,766.42/139,027.79
  6. Step 6: Final answer
    x = 82,077.86

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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.