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Finding the Fourth Proportional to 69,369.90, 103,887.11 and 39,697.78

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Solution

The fourth proportional to 69,369.90, 103,887.11 and 39,697.78 is: 59,450.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,369.90 : 103,887.11 = 39,697.78 : x
  2. Step 2: Convert to fraction form
    69,369.90/103,887.11 = 39,697.78/x
  3. Step 3: Cross multiply
    69,369.90x = 103,887.11 × 39,697.78
  4. Step 4: Simplify right side
    69,369.90x = 4,124,087,477.14
  5. Step 5: Solve for x
    x = 4,124,087,477.14/69,369.90
  6. Step 6: Final answer
    x = 59,450.68

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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.