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Finding the Fourth Proportional to 71,491.74, 107,138.97 and 53,942.10

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Solution

The fourth proportional to 71,491.74, 107,138.97 and 53,942.10 is: 80,838.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,491.74 : 107,138.97 = 53,942.10 : x
  2. Step 2: Convert to fraction form
    71,491.74/107,138.97 = 53,942.10/x
  3. Step 3: Cross multiply
    71,491.74x = 107,138.97 × 53,942.10
  4. Step 4: Simplify right side
    71,491.74x = 5,779,301,033.64
  5. Step 5: Solve for x
    x = 5,779,301,033.64/71,491.74
  6. Step 6: Final answer
    x = 80,838.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.