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Finding the Fourth Proportional to 103,447.70, 155,171.55 and 102,791.60

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Solution

The fourth proportional to 103,447.70, 155,171.55 and 102,791.60 is: 154,187.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,447.70 : 155,171.55 = 102,791.60 : x
  2. Step 2: Convert to fraction form
    103,447.70/155,171.55 = 102,791.60/x
  3. Step 3: Cross multiply
    103,447.70x = 155,171.55 × 102,791.60
  4. Step 4: Simplify right side
    103,447.70x = 15,950,331,898.98
  5. Step 5: Solve for x
    x = 15,950,331,898.98/103,447.70
  6. Step 6: Final answer
    x = 154,187.40

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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.