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Finding the Fourth Proportional to 66,257.80, 99,360.30 and 21,872.20

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Solution

The fourth proportional to 66,257.80, 99,360.30 and 21,872.20 is: 32,799.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,257.80 : 99,360.30 = 21,872.20 : x
  2. Step 2: Convert to fraction form
    66,257.80/99,360.30 = 21,872.20/x
  3. Step 3: Cross multiply
    66,257.80x = 99,360.30 × 21,872.20
  4. Step 4: Simplify right side
    66,257.80x = 2,173,228,353.66
  5. Step 5: Solve for x
    x = 2,173,228,353.66/66,257.80
  6. Step 6: Final answer
    x = 32,799.59

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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.