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Finding the Fourth Proportional to 89,676.91, 123,759.74 and 49,390.66

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Solution

The fourth proportional to 89,676.91, 123,759.74 and 49,390.66 is: 68,162.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,676.91 : 123,759.74 = 49,390.66 : x
  2. Step 2: Convert to fraction form
    89,676.91/123,759.74 = 49,390.66/x
  3. Step 3: Cross multiply
    89,676.91x = 123,759.74 × 49,390.66
  4. Step 4: Simplify right side
    89,676.91x = 6,112,575,240.03
  5. Step 5: Solve for x
    x = 6,112,575,240.03/89,676.91
  6. Step 6: Final answer
    x = 68,162.20

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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.