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Finding the Fourth Proportional to 139,314.16, 192,252.56 and 75,651.92

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Solution

The fourth proportional to 139,314.16, 192,252.56 and 75,651.92 is: 104,399.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,314.16 : 192,252.56 = 75,651.92 : x
  2. Step 2: Convert to fraction form
    139,314.16/192,252.56 = 75,651.92/x
  3. Step 3: Cross multiply
    139,314.16x = 192,252.56 × 75,651.92
  4. Step 4: Simplify right side
    139,314.16x = 14,544,275,288.92
  5. Step 5: Solve for x
    x = 14,544,275,288.92/139,314.16
  6. Step 6: Final answer
    x = 104,399.12

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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.