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Finding the Fourth Proportional to 81,907.08, 122,860.52 and 25,752.09

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Solution

The fourth proportional to 81,907.08, 122,860.52 and 25,752.09 is: 38,628.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,907.08 : 122,860.52 = 25,752.09 : x
  2. Step 2: Convert to fraction form
    81,907.08/122,860.52 = 25,752.09/x
  3. Step 3: Cross multiply
    81,907.08x = 122,860.52 × 25,752.09
  4. Step 4: Simplify right side
    81,907.08x = 3,163,915,039.73
  5. Step 5: Solve for x
    x = 3,163,915,039.73/81,907.08
  6. Step 6: Final answer
    x = 38,628.10

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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.