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Finding the Fourth Proportional to 81,865.64, 122,667.32 and 73,992.44

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Solution

The fourth proportional to 81,865.64, 122,667.32 and 73,992.44 is: 110,870.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,865.64 : 122,667.32 = 73,992.44 : x
  2. Step 2: Convert to fraction form
    81,865.64/122,667.32 = 73,992.44/x
  3. Step 3: Cross multiply
    81,865.64x = 122,667.32 × 73,992.44
  4. Step 4: Simplify right side
    81,865.64x = 9,076,454,315.06
  5. Step 5: Solve for x
    x = 9,076,454,315.06/81,865.64
  6. Step 6: Final answer
    x = 110,870.13

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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.