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Finding the Fourth Proportional to 66,372.72, 99,553.52 and 21,984.96

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Solution

The fourth proportional to 66,372.72, 99,553.52 and 21,984.96 is: 32,975.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,372.72 : 99,553.52 = 21,984.96 : x
  2. Step 2: Convert to fraction form
    66,372.72/99,553.52 = 21,984.96/x
  3. Step 3: Cross multiply
    66,372.72x = 99,553.52 × 21,984.96
  4. Step 4: Simplify right side
    66,372.72x = 2,188,680,155.06
  5. Step 5: Solve for x
    x = 2,188,680,155.06/66,372.72
  6. Step 6: Final answer
    x = 32,975.60

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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.