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Finding the Fourth Proportional to 139,601.68, 192,607.68 and 79,169.20

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Solution

The fourth proportional to 139,601.68, 192,607.68 and 79,169.20 is: 109,229.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,601.68 : 192,607.68 = 79,169.20 : x
  2. Step 2: Convert to fraction form
    139,601.68/192,607.68 = 79,169.20/x
  3. Step 3: Cross multiply
    139,601.68x = 192,607.68 × 79,169.20
  4. Step 4: Simplify right side
    139,601.68x = 15,248,595,939.46
  5. Step 5: Solve for x
    x = 15,248,595,939.46/139,601.68
  6. Step 6: Final answer
    x = 109,229.32

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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.