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Finding the Fourth Proportional to 71,439.53, 107,137.41 and 49,394.57

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Solution

The fourth proportional to 71,439.53, 107,137.41 and 49,394.57 is: 74,076.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,439.53 : 107,137.41 = 49,394.57 : x
  2. Step 2: Convert to fraction form
    71,439.53/107,137.41 = 49,394.57/x
  3. Step 3: Cross multiply
    71,439.53x = 107,137.41 × 49,394.57
  4. Step 4: Simplify right side
    71,439.53x = 5,292,005,762.18
  5. Step 5: Solve for x
    x = 5,292,005,762.18/71,439.53
  6. Step 6: Final answer
    x = 74,076.72

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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.