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Finding the Fourth Proportional to 139,231.06, 192,139.01 and 75,568.87

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Solution

The fourth proportional to 139,231.06, 192,139.01 and 75,568.87 is: 104,285.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,231.06 : 192,139.01 = 75,568.87 : x
  2. Step 2: Convert to fraction form
    139,231.06/192,139.01 = 75,568.87/x
  3. Step 3: Cross multiply
    139,231.06x = 192,139.01 × 75,568.87
  4. Step 4: Simplify right side
    139,231.06x = 14,519,727,490.77
  5. Step 5: Solve for x
    x = 14,519,727,490.77/139,231.06
  6. Step 6: Final answer
    x = 104,285.12

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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.