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Finding the Fourth Proportional to 81,124.68, 111,932.04 and 49,291.68

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Solution

The fourth proportional to 81,124.68, 111,932.04 and 49,291.68 is: 68,010.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,124.68 : 111,932.04 = 49,291.68 : x
  2. Step 2: Convert to fraction form
    81,124.68/111,932.04 = 49,291.68/x
  3. Step 3: Cross multiply
    81,124.68x = 111,932.04 × 49,291.68
  4. Step 4: Simplify right side
    81,124.68x = 5,517,318,297.43
  5. Step 5: Solve for x
    x = 5,517,318,297.43/81,124.68
  6. Step 6: Final answer
    x = 68,010.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.