Home / 81,390.41-122,273.22-78,027.45

Finding the Fourth Proportional to 81,390.41, 122,273.22 and 78,027.45

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Solution

The fourth proportional to 81,390.41, 122,273.22 and 78,027.45 is: 117,221.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,390.41 : 122,273.22 = 78,027.45 : x
  2. Step 2: Convert to fraction form
    81,390.41/122,273.22 = 78,027.45/x
  3. Step 3: Cross multiply
    81,390.41x = 122,273.22 × 78,027.45
  4. Step 4: Simplify right side
    81,390.41x = 9,540,667,559.89
  5. Step 5: Solve for x
    x = 9,540,667,559.89/81,390.41
  6. Step 6: Final answer
    x = 117,221.04

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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.