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Finding the Fourth Proportional to 139,418.84, 192,399.50 and 75,756.63

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Solution

The fourth proportional to 139,418.84, 192,399.50 and 75,756.63 is: 104,544.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,418.84 : 192,399.50 = 75,756.63 : x
  2. Step 2: Convert to fraction form
    139,418.84/192,399.50 = 75,756.63/x
  3. Step 3: Cross multiply
    139,418.84x = 192,399.50 × 75,756.63
  4. Step 4: Simplify right side
    139,418.84x = 14,575,538,644.57
  5. Step 5: Solve for x
    x = 14,575,538,644.57/139,418.84
  6. Step 6: Final answer
    x = 104,544.97

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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.