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Finding the Fourth Proportional to 68,187.76, 102,297.13 and 20,807.09

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Solution

The fourth proportional to 68,187.76, 102,297.13 and 20,807.09 is: 31,215.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,187.76 : 102,297.13 = 20,807.09 : x
  2. Step 2: Convert to fraction form
    68,187.76/102,297.13 = 20,807.09/x
  3. Step 3: Cross multiply
    68,187.76x = 102,297.13 × 20,807.09
  4. Step 4: Simplify right side
    68,187.76x = 2,128,505,590.65
  5. Step 5: Solve for x
    x = 2,128,505,590.65/68,187.76
  6. Step 6: Final answer
    x = 31,215.36

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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.