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Finding the Fourth Proportional to 139,709.37, 192,793.56 and 79,276.41

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Solution

The fourth proportional to 139,709.37, 192,793.56 and 79,276.41 is: 109,398.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,709.37 : 192,793.56 = 79,276.41 : x
  2. Step 2: Convert to fraction form
    139,709.37/192,793.56 = 79,276.41/x
  3. Step 3: Cross multiply
    139,709.37x = 192,793.56 × 79,276.41
  4. Step 4: Simplify right side
    139,709.37x = 15,283,981,307.92
  5. Step 5: Solve for x
    x = 15,283,981,307.92/139,709.37
  6. Step 6: Final answer
    x = 109,398.40

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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.