Home / 139,548.69-192,593.43-78,311.75

Finding the Fourth Proportional to 139,548.69, 192,593.43 and 78,311.75

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Solution

The fourth proportional to 139,548.69, 192,593.43 and 78,311.75 is: 108,079.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,548.69 : 192,593.43 = 78,311.75 : x
  2. Step 2: Convert to fraction form
    139,548.69/192,593.43 = 78,311.75/x
  3. Step 3: Cross multiply
    139,548.69x = 192,593.43 × 78,311.75
  4. Step 4: Simplify right side
    139,548.69x = 15,082,327,578.84
  5. Step 5: Solve for x
    x = 15,082,327,578.84/139,548.69
  6. Step 6: Final answer
    x = 108,079.32

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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.