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Finding the Fourth Proportional to 81,661.29, 112,704.78 and 49,848.67

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Solution

The fourth proportional to 81,661.29, 112,704.78 and 49,848.67 is: 68,798.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,661.29 : 112,704.78 = 49,848.67 : x
  2. Step 2: Convert to fraction form
    81,661.29/112,704.78 = 49,848.67/x
  3. Step 3: Cross multiply
    81,661.29x = 112,704.78 × 49,848.67
  4. Step 4: Simplify right side
    81,661.29x = 5,618,183,385.64
  5. Step 5: Solve for x
    x = 5,618,183,385.64/81,661.29
  6. Step 6: Final answer
    x = 68,798.61

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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.