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Finding the Fourth Proportional to 68,028.10, 102,048.87 and 21,281.86

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Solution

The fourth proportional to 68,028.10, 102,048.87 and 21,281.86 is: 31,924.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,028.10 : 102,048.87 = 21,281.86 : x
  2. Step 2: Convert to fraction form
    68,028.10/102,048.87 = 21,281.86/x
  3. Step 3: Cross multiply
    68,028.10x = 102,048.87 × 21,281.86
  4. Step 4: Simplify right side
    68,028.10x = 2,171,789,764.50
  5. Step 5: Solve for x
    x = 2,171,789,764.50/68,028.10
  6. Step 6: Final answer
    x = 31,924.89

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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.