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Finding the Fourth Proportional to 81,950.73, 122,735.55 and 79,109.51

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Solution

The fourth proportional to 81,950.73, 122,735.55 and 79,109.51 is: 118,480.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,950.73 : 122,735.55 = 79,109.51 : x
  2. Step 2: Convert to fraction form
    81,950.73/122,735.55 = 79,109.51/x
  3. Step 3: Cross multiply
    81,950.73x = 122,735.55 × 79,109.51
  4. Step 4: Simplify right side
    81,950.73x = 9,709,549,731.49
  5. Step 5: Solve for x
    x = 9,709,549,731.49/81,950.73
  6. Step 6: Final answer
    x = 118,480.33

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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.