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Finding the Fourth Proportional to 67,474.56, 101,211.84 and 20,721.36

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Solution

The fourth proportional to 67,474.56, 101,211.84 and 20,721.36 is: 31,082.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,474.56 : 101,211.84 = 20,721.36 : x
  2. Step 2: Convert to fraction form
    67,474.56/101,211.84 = 20,721.36/x
  3. Step 3: Cross multiply
    67,474.56x = 101,211.84 × 20,721.36
  4. Step 4: Simplify right side
    67,474.56x = 2,097,246,972.90
  5. Step 5: Solve for x
    x = 2,097,246,972.90/67,474.56
  6. Step 6: Final answer
    x = 31,082.04

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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.