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Finding the Fourth Proportional to 73,778.65, 110,438.88 and 39,960.67

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Solution

The fourth proportional to 73,778.65, 110,438.88 and 39,960.67 is: 59,816.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,778.65 : 110,438.88 = 39,960.67 : x
  2. Step 2: Convert to fraction form
    73,778.65/110,438.88 = 39,960.67/x
  3. Step 3: Cross multiply
    73,778.65x = 110,438.88 × 39,960.67
  4. Step 4: Simplify right side
    73,778.65x = 4,413,211,638.85
  5. Step 5: Solve for x
    x = 4,413,211,638.85/73,778.65
  6. Step 6: Final answer
    x = 59,816.92

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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.