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Finding the Fourth Proportional to 139,651.24, 192,723.56 and 75,991.48

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Solution

The fourth proportional to 139,651.24, 192,723.56 and 75,991.48 is: 104,870.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,651.24 : 192,723.56 = 75,991.48 : x
  2. Step 2: Convert to fraction form
    139,651.24/192,723.56 = 75,991.48/x
  3. Step 3: Cross multiply
    139,651.24x = 192,723.56 × 75,991.48
  4. Step 4: Simplify right side
    139,651.24x = 14,645,348,555.27
  5. Step 5: Solve for x
    x = 14,645,348,555.27/139,651.24
  6. Step 6: Final answer
    x = 104,870.88

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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.