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Finding the Fourth Proportional to 99,749.50, 137,704.49 and 63,487.43

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Solution

The fourth proportional to 99,749.50, 137,704.49 and 63,487.43 is: 87,644.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,749.50 : 137,704.49 = 63,487.43 : x
  2. Step 2: Convert to fraction form
    99,749.50/137,704.49 = 63,487.43/x
  3. Step 3: Cross multiply
    99,749.50x = 137,704.49 × 63,487.43
  4. Step 4: Simplify right side
    99,749.50x = 8,742,504,169.56
  5. Step 5: Solve for x
    x = 8,742,504,169.56/99,749.50
  6. Step 6: Final answer
    x = 87,644.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.