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Finding the Fourth Proportional to 72,519.44, 108,778.73 and 39,449.67

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Solution

The fourth proportional to 72,519.44, 108,778.73 and 39,449.67 is: 59,174.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,519.44 : 108,778.73 = 39,449.67 : x
  2. Step 2: Convert to fraction form
    72,519.44/108,778.73 = 39,449.67/x
  3. Step 3: Cross multiply
    72,519.44x = 108,778.73 × 39,449.67
  4. Step 4: Simplify right side
    72,519.44x = 4,291,285,001.52
  5. Step 5: Solve for x
    x = 4,291,285,001.52/72,519.44
  6. Step 6: Final answer
    x = 59,174.27

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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.