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Finding the Fourth Proportional to 64,942.50, 89,620.65 and 36,647.58

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Solution

The fourth proportional to 64,942.50, 89,620.65 and 36,647.58 is: 50,573.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,942.50 : 89,620.65 = 36,647.58 : x
  2. Step 2: Convert to fraction form
    64,942.50/89,620.65 = 36,647.58/x
  3. Step 3: Cross multiply
    64,942.50x = 89,620.65 × 36,647.58
  4. Step 4: Simplify right side
    64,942.50x = 3,284,379,940.53
  5. Step 5: Solve for x
    x = 3,284,379,940.53/64,942.50
  6. Step 6: Final answer
    x = 50,573.66

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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.