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Finding the Fourth Proportional to 45,605.70, 68,372.10 and 19,288.80

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Solution

The fourth proportional to 45,605.70, 68,372.10 and 19,288.80 is: 28,917.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,605.70 : 68,372.10 = 19,288.80 : x
  2. Step 2: Convert to fraction form
    45,605.70/68,372.10 = 19,288.80/x
  3. Step 3: Cross multiply
    45,605.70x = 68,372.10 × 19,288.80
  4. Step 4: Simplify right side
    45,605.70x = 1,318,815,762.48
  5. Step 5: Solve for x
    x = 1,318,815,762.48/45,605.70
  6. Step 6: Final answer
    x = 28,917.78

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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.