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Finding the Fourth Proportional to 81,351.57, 122,044.46 and 28,048.50

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Solution

The fourth proportional to 81,351.57, 122,044.46 and 28,048.50 is: 42,078.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,351.57 : 122,044.46 = 28,048.50 : x
  2. Step 2: Convert to fraction form
    81,351.57/122,044.46 = 28,048.50/x
  3. Step 3: Cross multiply
    81,351.57x = 122,044.46 × 28,048.50
  4. Step 4: Simplify right side
    81,351.57x = 3,423,164,036.31
  5. Step 5: Solve for x
    x = 3,423,164,036.31/81,351.57
  6. Step 6: Final answer
    x = 42,078.65

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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.