Home / 81,438.12-122,155.45-22,273.79

Finding the Fourth Proportional to 81,438.12, 122,155.45 and 22,273.79

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Solution

The fourth proportional to 81,438.12, 122,155.45 and 22,273.79 is: 33,410.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,438.12 : 122,155.45 = 22,273.79 : x
  2. Step 2: Convert to fraction form
    81,438.12/122,155.45 = 22,273.79/x
  3. Step 3: Cross multiply
    81,438.12x = 122,155.45 × 22,273.79
  4. Step 4: Simplify right side
    81,438.12x = 2,720,864,840.66
  5. Step 5: Solve for x
    x = 2,720,864,840.66/81,438.12
  6. Step 6: Final answer
    x = 33,410.21

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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.