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Finding the Fourth Proportional to 139,177.44, 208,595.25 and 79,723.71

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Solution

The fourth proportional to 139,177.44, 208,595.25 and 79,723.71 is: 119,487.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,177.44 : 208,595.25 = 79,723.71 : x
  2. Step 2: Convert to fraction form
    139,177.44/208,595.25 = 79,723.71/x
  3. Step 3: Cross multiply
    139,177.44x = 208,595.25 × 79,723.71
  4. Step 4: Simplify right side
    139,177.44x = 16,629,987,218.38
  5. Step 5: Solve for x
    x = 16,629,987,218.38/139,177.44
  6. Step 6: Final answer
    x = 119,487.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.