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Finding the Fourth Proportional to 81,173.10, 121,760.46 and 22,009.89

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Solution

The fourth proportional to 81,173.10, 121,760.46 and 22,009.89 is: 33,015.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,173.10 : 121,760.46 = 22,009.89 : x
  2. Step 2: Convert to fraction form
    81,173.10/121,760.46 = 22,009.89/x
  3. Step 3: Cross multiply
    81,173.10x = 121,760.46 × 22,009.89
  4. Step 4: Simplify right side
    81,173.10x = 2,679,934,330.95
  5. Step 5: Solve for x
    x = 2,679,934,330.95/81,173.10
  6. Step 6: Final answer
    x = 33,015.05

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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.