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Finding the Fourth Proportional to 81,788.64, 112,874.26 and 49,963.53

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Solution

The fourth proportional to 81,788.64, 112,874.26 and 49,963.53 is: 68,953.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,788.64 : 112,874.26 = 49,963.53 : x
  2. Step 2: Convert to fraction form
    81,788.64/112,874.26 = 49,963.53/x
  3. Step 3: Cross multiply
    81,788.64x = 112,874.26 × 49,963.53
  4. Step 4: Simplify right side
    81,788.64x = 5,639,596,867.79
  5. Step 5: Solve for x
    x = 5,639,596,867.79/81,788.64
  6. Step 6: Final answer
    x = 68,953.31

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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.