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Finding the Fourth Proportional to 64,855.54, 89,486.97 and 39,375.30

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Solution

The fourth proportional to 64,855.54, 89,486.97 and 39,375.30 is: 54,329.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,855.54 : 89,486.97 = 39,375.30 : x
  2. Step 2: Convert to fraction form
    64,855.54/89,486.97 = 39,375.30/x
  3. Step 3: Cross multiply
    64,855.54x = 89,486.97 × 39,375.30
  4. Step 4: Simplify right side
    64,855.54x = 3,523,576,289.84
  5. Step 5: Solve for x
    x = 3,523,576,289.84/64,855.54
  6. Step 6: Final answer
    x = 54,329.61

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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.