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Finding the Fourth Proportional to 81,901.56, 122,774.50 and 32,013.64

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Solution

The fourth proportional to 81,901.56, 122,774.50 and 32,013.64 is: 47,990.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,901.56 : 122,774.50 = 32,013.64 : x
  2. Step 2: Convert to fraction form
    81,901.56/122,774.50 = 32,013.64/x
  3. Step 3: Cross multiply
    81,901.56x = 122,774.50 × 32,013.64
  4. Step 4: Simplify right side
    81,901.56x = 3,930,458,644.18
  5. Step 5: Solve for x
    x = 3,930,458,644.18/81,901.56
  6. Step 6: Final answer
    x = 47,990.03

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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.