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Finding the Fourth Proportional to 139,231.17, 192,139.19 and 75,568.98

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Solution

The fourth proportional to 139,231.17, 192,139.19 and 75,568.98 is: 104,285.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,231.17 : 192,139.19 = 75,568.98 : x
  2. Step 2: Convert to fraction form
    139,231.17/192,139.19 = 75,568.98/x
  3. Step 3: Cross multiply
    139,231.17x = 192,139.19 × 75,568.98
  4. Step 4: Simplify right side
    139,231.17x = 14,519,763,232.39
  5. Step 5: Solve for x
    x = 14,519,763,232.39/139,231.17
  6. Step 6: Final answer
    x = 104,285.29

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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.