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Finding the Fourth Proportional to 81,163.40, 121,745.10 and 22,006.40

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Solution

The fourth proportional to 81,163.40, 121,745.10 and 22,006.40 is: 33,009.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,163.40 : 121,745.10 = 22,006.40 : x
  2. Step 2: Convert to fraction form
    81,163.40/121,745.10 = 22,006.40/x
  3. Step 3: Cross multiply
    81,163.40x = 121,745.10 × 22,006.40
  4. Step 4: Simplify right side
    81,163.40x = 2,679,171,368.64
  5. Step 5: Solve for x
    x = 2,679,171,368.64/81,163.40
  6. Step 6: Final answer
    x = 33,009.60

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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.