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Finding the Fourth Proportional to 100,676.98, 138,937.81 and 55,358.41

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Solution

The fourth proportional to 100,676.98, 138,937.81 and 55,358.41 is: 76,396.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,676.98 : 138,937.81 = 55,358.41 : x
  2. Step 2: Convert to fraction form
    100,676.98/138,937.81 = 55,358.41/x
  3. Step 3: Cross multiply
    100,676.98x = 138,937.81 × 55,358.41
  4. Step 4: Simplify right side
    100,676.98x = 7,691,376,364.11
  5. Step 5: Solve for x
    x = 7,691,376,364.11/100,676.98
  6. Step 6: Final answer
    x = 76,396.58

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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.