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Finding the Fourth Proportional to 139,722.24, 192,817.88 and 76,059.88

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Solution

The fourth proportional to 139,722.24, 192,817.88 and 76,059.88 is: 104,963.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,722.24 : 192,817.88 = 76,059.88 : x
  2. Step 2: Convert to fraction form
    139,722.24/192,817.88 = 76,059.88/x
  3. Step 3: Cross multiply
    139,722.24x = 192,817.88 × 76,059.88
  4. Step 4: Simplify right side
    139,722.24x = 14,665,704,814.65
  5. Step 5: Solve for x
    x = 14,665,704,814.65/139,722.24
  6. Step 6: Final answer
    x = 104,963.28

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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.