Home / 81,929.78-122,924.28-28,629.65

Finding the Fourth Proportional to 81,929.78, 122,924.28 and 28,629.65

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Solution

The fourth proportional to 81,929.78, 122,924.28 and 28,629.65 is: 42,954.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,929.78 : 122,924.28 = 28,629.65 : x
  2. Step 2: Convert to fraction form
    81,929.78/122,924.28 = 28,629.65/x
  3. Step 3: Cross multiply
    81,929.78x = 122,924.28 × 28,629.65
  4. Step 4: Simplify right side
    81,929.78x = 3,519,279,527.57
  5. Step 5: Solve for x
    x = 3,519,279,527.57/81,929.78
  6. Step 6: Final answer
    x = 42,954.83

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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.