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Finding the Fourth Proportional to 67,872.34, 101,808.52 and 21,125.24

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Solution

The fourth proportional to 67,872.34, 101,808.52 and 21,125.24 is: 31,687.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,872.34 : 101,808.52 = 21,125.24 : x
  2. Step 2: Convert to fraction form
    67,872.34/101,808.52 = 21,125.24/x
  3. Step 3: Cross multiply
    67,872.34x = 101,808.52 × 21,125.24
  4. Step 4: Simplify right side
    67,872.34x = 2,150,729,419.04
  5. Step 5: Solve for x
    x = 2,150,729,419.04/67,872.34
  6. Step 6: Final answer
    x = 31,687.86

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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.