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Finding the Fourth Proportional to 68,439.33, 102,659.00 and 21,692.21

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Solution

The fourth proportional to 68,439.33, 102,659.00 and 21,692.21 is: 32,538.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,439.33 : 102,659.00 = 21,692.21 : x
  2. Step 2: Convert to fraction form
    68,439.33/102,659.00 = 21,692.21/x
  3. Step 3: Cross multiply
    68,439.33x = 102,659.00 × 21,692.21
  4. Step 4: Simplify right side
    68,439.33x = 2,226,899,964.63
  5. Step 5: Solve for x
    x = 2,226,899,964.63/68,439.33
  6. Step 6: Final answer
    x = 32,538.31

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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.