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Finding the Fourth Proportional to 81,013.98, 121,585.98 and 36,644.58

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Solution

The fourth proportional to 81,013.98, 121,585.98 and 36,644.58 is: 54,996.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,013.98 : 121,585.98 = 36,644.58 : x
  2. Step 2: Convert to fraction form
    81,013.98/121,585.98 = 36,644.58/x
  3. Step 3: Cross multiply
    81,013.98x = 121,585.98 × 36,644.58
  4. Step 4: Simplify right side
    81,013.98x = 4,455,467,170.99
  5. Step 5: Solve for x
    x = 4,455,467,170.99/81,013.98
  6. Step 6: Final answer
    x = 54,996.28

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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.