Home / 81,288.83-121,902.94-27,965.90

Finding the Fourth Proportional to 81,288.83, 121,902.94 and 27,965.90

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Solution

The fourth proportional to 81,288.83, 121,902.94 and 27,965.90 is: 41,938.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,288.83 : 121,902.94 = 27,965.90 : x
  2. Step 2: Convert to fraction form
    81,288.83/121,902.94 = 27,965.90/x
  3. Step 3: Cross multiply
    81,288.83x = 121,902.94 × 27,965.90
  4. Step 4: Simplify right side
    81,288.83x = 3,409,125,429.75
  5. Step 5: Solve for x
    x = 3,409,125,429.75/81,288.83
  6. Step 6: Final answer
    x = 41,938.42

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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.