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Finding the Fourth Proportional to 63,172.78, 87,178.41 and 36,320.54

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Solution

The fourth proportional to 63,172.78, 87,178.41 and 36,320.54 is: 50,122.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,172.78 : 87,178.41 = 36,320.54 : x
  2. Step 2: Convert to fraction form
    63,172.78/87,178.41 = 36,320.54/x
  3. Step 3: Cross multiply
    63,172.78x = 87,178.41 × 36,320.54
  4. Step 4: Simplify right side
    63,172.78x = 3,166,366,491.65
  5. Step 5: Solve for x
    x = 3,166,366,491.65/63,172.78
  6. Step 6: Final answer
    x = 50,122.33

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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.