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Finding the Fourth Proportional to 139,644.14, 192,676.12 and 79,200.86

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Solution

The fourth proportional to 139,644.14, 192,676.12 and 79,200.86 is: 109,278.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,644.14 : 192,676.12 = 79,200.86 : x
  2. Step 2: Convert to fraction form
    139,644.14/192,676.12 = 79,200.86/x
  3. Step 3: Cross multiply
    139,644.14x = 192,676.12 × 79,200.86
  4. Step 4: Simplify right side
    139,644.14x = 15,260,113,244.08
  5. Step 5: Solve for x
    x = 15,260,113,244.08/139,644.14
  6. Step 6: Final answer
    x = 109,278.58

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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.