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Finding the Fourth Proportional to 139,962.84, 193,149.39 and 79,536.75

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Solution

The fourth proportional to 139,962.84, 193,149.39 and 79,536.75 is: 109,761.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,962.84 : 193,149.39 = 79,536.75 : x
  2. Step 2: Convert to fraction form
    139,962.84/193,149.39 = 79,536.75/x
  3. Step 3: Cross multiply
    139,962.84x = 193,149.39 × 79,536.75
  4. Step 4: Simplify right side
    139,962.84x = 15,362,474,745.08
  5. Step 5: Solve for x
    x = 15,362,474,745.08/139,962.84
  6. Step 6: Final answer
    x = 109,761.10

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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.