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Finding the Fourth Proportional to 78,610.74, 108,554.90 and 49,939.62

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Solution

The fourth proportional to 78,610.74, 108,554.90 and 49,939.62 is: 68,962.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,610.74 : 108,554.90 = 49,939.62 : x
  2. Step 2: Convert to fraction form
    78,610.74/108,554.90 = 49,939.62/x
  3. Step 3: Cross multiply
    78,610.74x = 108,554.90 × 49,939.62
  4. Step 4: Simplify right side
    78,610.74x = 5,421,190,205.44
  5. Step 5: Solve for x
    x = 5,421,190,205.44/78,610.74
  6. Step 6: Final answer
    x = 68,962.46

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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.