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Finding the Fourth Proportional to 79,358.42, 109,485.78 and 52,149.09

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Solution

The fourth proportional to 79,358.42, 109,485.78 and 52,149.09 is: 71,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,358.42 : 109,485.78 = 52,149.09 : x
  2. Step 2: Convert to fraction form
    79,358.42/109,485.78 = 52,149.09/x
  3. Step 3: Cross multiply
    79,358.42x = 109,485.78 × 52,149.09
  4. Step 4: Simplify right side
    79,358.42x = 5,709,583,794.94
  5. Step 5: Solve for x
    x = 5,709,583,794.94/79,358.42
  6. Step 6: Final answer
    x = 71,946.80

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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.