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Finding the Fourth Proportional to 139,848.72, 209,778.84 and 73,251.60

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Solution

The fourth proportional to 139,848.72, 209,778.84 and 73,251.60 is: 109,880.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,848.72 : 209,778.84 = 73,251.60 : x
  2. Step 2: Convert to fraction form
    139,848.72/209,778.84 = 73,251.60/x
  3. Step 3: Cross multiply
    139,848.72x = 209,778.84 × 73,251.60
  4. Step 4: Simplify right side
    139,848.72x = 15,366,635,676.14
  5. Step 5: Solve for x
    x = 15,366,635,676.14/139,848.72
  6. Step 6: Final answer
    x = 109,880.42

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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.