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Finding the Fourth Proportional to 81,450.60, 112,380.75 and 49,159.71

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Solution

The fourth proportional to 81,450.60, 112,380.75 and 49,159.71 is: 67,827.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,450.60 : 112,380.75 = 49,159.71 : x
  2. Step 2: Convert to fraction form
    81,450.60/112,380.75 = 49,159.71/x
  3. Step 3: Cross multiply
    81,450.60x = 112,380.75 × 49,159.71
  4. Step 4: Simplify right side
    81,450.60x = 5,524,605,079.58
  5. Step 5: Solve for x
    x = 5,524,605,079.58/81,450.60
  6. Step 6: Final answer
    x = 67,827.68

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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.