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Finding the Fourth Proportional to 81,455.66, 112,408.66 and 49,624.55

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Solution

The fourth proportional to 81,455.66, 112,408.66 and 49,624.55 is: 68,481.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,455.66 : 112,408.66 = 49,624.55 : x
  2. Step 2: Convert to fraction form
    81,455.66/112,408.66 = 49,624.55/x
  3. Step 3: Cross multiply
    81,455.66x = 112,408.66 × 49,624.55
  4. Step 4: Simplify right side
    81,455.66x = 5,578,229,168.60
  5. Step 5: Solve for x
    x = 5,578,229,168.60/81,455.66
  6. Step 6: Final answer
    x = 68,481.79

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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.